Current portion of long-term debt

3,580.6

3,444.3

Other non-current assets

509.7

471.2

TOTAL ASSETS

13,493.9

12,908.7

LIABILITIES:

Accounts payable

6,584.8

6,647.2

Accrued liabilities

728.2

830.0

Short-term borrowings

172.1

153.5

216.6

^[1],[2]

404.8

^[1],[2]

Total current liabilities

7,701.7

8,035.5

Long-term debt

2,060.8

1,210.9

Deferred compensation

489.0

440.3

Other non-current liabilities

558.6

481.3

TOTAL LIABILITIES

10,810.1

10,168.0

Redeemable noncontrolling interests (see Note 6)

227.2

243.4

STOCKHOLDERS' EQUITY:

Preferred stock

221.5

Common stock

48.8

48.2

Additional paid-in capital

2,465.4

2,427.5

Retained earnings

738.3

405.1

Accumulated other comprehensive loss, net of tax

(288.0)

(225.7)

Stockholders Equity Subtotal Before Treasury Stock

3,186.0

2,876.6

Less: Treasury stock

(765.4)

(414.9)

Total IPG stockholders' equity

2,420.6

2,461.7

Noncontrolling interests

36.0

35.6

TOTAL STOCKHOLDERS' EQUITY

2,456.6

2,497.3

TOTAL LIABILITIES AND EQUITY

$ 13,493.9

$ 12,908.7

[1]

On March 15, 2013, holders of our 4.75% Convertible Senior Notes due 2023 (the “4.75% Notes”) may require us to repurchase their notes for cash, stock or a combination, at our election, at par, and accordingly, we included these notes in the current portion of long-term debt on our December 31, 2012 Consolidated Balance Sheet. We included our 4.25% Convertible Senior Notes due 2023 (the “4.25% Notes”) in the current portion of long-term debt on our December 31, 2011 Consolidated Balance Sheet because holders of the 4.25% Notes had a repurchase option on March 15, 2012 for cash at par. The 4.25% Notes were retired in the first quarter of 2012.

[2]

See Note 17 for further information regarding subsequent events.

Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 464.6	$ 551.5	$ 281.2
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of fixed assets and intangible assets	147.7	150.9	148.4
Provision for uncollectible receivables	16.3	10.4	10.7
Amortization of restricted stock and other non-cash compensation	44.5	51.7	50.0
Net amortization of bond discounts (premiums) and deferred financing costs	1.8	(8.7)	(4.4)
Deferred income tax provision	103.6	83.9	56.0
Gain on sale of an investment	(93.6)	(132.2)	0
Other	12.3	28.2	25.0
Changes in assets and liabilities, net of acquisitions and dispositions, providing (using) cash:
Accounts receivable	(44.7)	(219.2)	(547.6)
Expenditures billable to clients	(73.8)	(39.2)	(122.8)
Other current assets	3.5	(42.0)	(0.2)
Accounts payable	(120.4)	(62.9)	867.4
Accrued liabilities	(57.8)	3.9	66.4
Other non-current assets and liabilities	(46.8)	(102.8)	(12.8)
Net cash provided by operating activities	357.2	273.5	817.3
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(169.2)	(140.3)	(96.3)
Acquisitions, including deferred payments, net of cash acquired	(145.5)	(63.1)	(61.9)
Proceeds from the sale of an investment	94.8	133.5	0
Other investing activities	9.7	11.1	49.7
Net cash used in investing activities	(210.2)	(58.8)	(108.5)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of long-term debt	1,044.6	0	0
Purchase of long-term debt	(401.5)	(38.9)	(217.3)
Repurchase of common stock	(350.5)	(400.8)	0
Common stock dividends	(103.4)	(111.1)	0
Repurchase of preferred stock	0	0	(265.9)
Acquisition-related payments	(37.1)	(71.5)	(29.5)
Distributions to noncontrolling interests	(17.0)	(23.0)	(21.5)
Preferred stock dividends	(11.6)	(11.6)	(19.6)
Net increase in short term bank borrowings	12.6	42.5	17.4
Other financing activities	(4.8)	73.4	(11.3)
Net cash provided by (used in) financing activities	131.3	(541.0)	(547.7)
Effect of foreign exchange rate changes on cash and cash equivalents	(6.2)	(46.7)	19.4
Net increase (decrease) in cash and cash equivalents	272.1	(373.0)	180.5
Cash and cash equivalents at beginning of period	2,302.7	2,675.7	2,495.2
Cash and cash equivalents at end of period	$ 2,574.8	$ 2,302.7	$ 2,675.7

Consolidated Statements of Stockholders' Equity (USD $) In Millions	Total	Preferred Stock	Common Stock	Additional Paid-In Capital	Retained Earnings (Accumulated Deficit)	Accumulated Other Comprehensive Loss, Net of Tax	Treasury Stock	Total IPG Stockholders' Equity	Noncontrolling Interests
Beginning balance at Dec. 31, 2009	$ 2,536.3	$ 525.0	$ 47.1	$ 2,441.0	$ (324.8)	$ (176.6)	$ (14.0)	$ 2,497.7	$ 38.6
Beginning balance, shares at Dec. 31, 2009			486.5
Net income	281.2				261.1			261.1	20.1
Other comprehensive income (loss)	59.5					57.6		57.6	1.9
Reclassifications related to redeemable noncontrolling interests	2.0			3.5				3.5	(1.5)
Noncontrolling interest transactions	(27.9)			(28.1)				(28.1)	0.2
Distributions to noncontrolling interests	(21.5)								(21.5)
Change in redemption value of redeemable noncontrolling interests	(11.0)			(11.0)				(11.0)
Repurchase of preferred stock	(267.6)	(303.5)		35.9				(267.6)
Capped call transaction costs	(22.8)			(22.8)				(22.8)
Preferred stock dividends	(15.6)			(15.6)				(15.6)
Stock-based compensation, shares			2.7
Stock-based compensation, value	55.8		0.4	55.4				55.8
Exercise of stock options, shares	0.5
Shares withheld for taxes, shares			(0.2)
Shares withheld for taxes, value	(11.9)		(0.1)	(11.8)				(11.9)
Tax effect from stock-based compensation	4.5			4.5				4.5
Other, shares			0.5
Other	5.9		0.1	5.8			(0.1)	5.8	0.1
Ending balance at Dec. 31, 2010	2,566.9	221.5	47.5	2,456.8	(63.7)	(119.0)	(14.1)	2,529.0	37.9
Ending balance, shares at Dec. 31, 2010			489.5
Net income	551.5				532.3			532.3	19.2
Other comprehensive income (loss)	(109.2)					(106.7)		(106.7)	(2.5)
Reclassifications related to redeemable noncontrolling interests	10.4			2.7				2.7	7.7
Noncontrolling interest transactions	(1.6)			0.4	0.6			1.0	(2.6)
Distributions to noncontrolling interests	(23.0)								(23.0)
Change in redemption value of redeemable noncontrolling interests	(14.1)			(10.6)	(3.5)			(14.1)
Repurchase of common stock	(400.8)						(400.8)	(400.8)
Common stock dividends	(111.1)			(56.8)	(54.3)			(111.1)
Preferred stock dividends	(11.6)			(5.8)	(5.8)			(11.6)
Stock-based compensation, shares			1.5
Stock-based compensation, value	48.7		0.8	47.9				48.7
Exercise of stock options, shares	1.3		1.3
Exercise of stock options, value	12.0		0.1	11.9				12.0
Shares withheld for taxes, shares			(0.9)
Shares withheld for taxes, value	(27.0)		(0.2)	(26.8)				(27.0)
Tax effect from stock-based compensation	8.4			8.4				8.4
Other	(2.2)			(0.6)	(0.5)			(1.1)	(1.1)
Ending balance at Dec. 31, 2011	2,497.3	221.5	48.2	2,427.5	405.1	(225.7)	(414.9)	2,461.7	35.6
Ending balance, shares at Dec. 31, 2011			491.4
Net income	464.6				446.7			446.7	17.9
Other comprehensive income (loss)	(63.4)					(62.3)		(62.3)	(1.1)
Reclassifications related to redeemable noncontrolling interests	10.9			12.0				12.0	(1.1)
Noncontrolling interest transactions	(2.2)								(2.2)
Distributions to noncontrolling interests	(17.0)								(17.0)
Change in redemption value of redeemable noncontrolling interests	2.7				2.7			2.7
Repurchase of common stock	(350.5)						(350.5)	(350.5)
Common stock dividends	(103.4)				(103.4)			(103.4)
Preferred stock dividends	(11.6)				(11.6)			(11.6)
Stock-based compensation, shares			1.6
Stock-based compensation, value	32.0		0.7	31.3				32.0
Exercise of stock options, shares	1.2		1.1
Exercise of stock options, value	10.9		0.1	10.8				10.9
Shares withheld for taxes, shares			(2.1)
Shares withheld for taxes, value	(23.7)		(0.2)	(23.5)				(23.7)
Tax effect from stock-based compensation	14.8			14.8				14.8
Other	(4.8)			(7.5)	(1.2)			(8.7)	3.9
Ending balance at Dec. 31, 2012	$ 2,456.6	$ 221.5	$ 48.8	$ 2,465.4	$ 738.3	$ (288.0)	$ (765.4)	$ 2,420.6	$ 36.0
Ending balance, shares at Dec. 31, 2012			492.0

Consolidated Balance Sheets (Paranthetical) Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 59.0	$ 55.4
Preferred stock, no par value	$ 0.00	$ 0.00
Preferred stock, shares authorized	20,000,000	20,000,000
Preferred stock, shares issued	200,000	200,000
Preferred stock, shares outstanding	200,000	200,000
Common stock, par value	$ 0.10	$ 0.10
Common stock, shares authorized	800,000,000	800,000,000
Common stock, shares issued	492,100,000	491,400,000
Common stock, shares outstanding	417,500,000	449,500,000
Treasury stock, shares	74,600,000	41,900,000

Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Statement of Other Comprehensive Income [Abstract]
Net income	$ 464.6	$ 551.5	$ 281.2
Other Comprehensive (Loss) Income
Foreign currency translation adjustments	9.7	(92.1)	35.9
Available-for-sale securities:
Changes in market value of available-for-sale securities	0.4	(0.1)	0.5
Less: recognition of previously unrealized losses (gains) included in net income	0.7	0.3	(0.2)
Available-for-sale securities, Income tax effect	(0.5)	0	0.1
Available-for-sale securities, Net of tax	0.6	0.2	0.4
Derivatives instruments:
Changes in fair value of derivative instruments	(21.9)	0	0
Less: recognition of previously unrealized losses included in net income	0.3	0	0
Derivative instruments, Income tax effect	8.9	0	0
Derivative instruments, Net of tax	(12.7)	0	0
Defined benefit pension and other postretirement plans:
Net actuarial gains (losses) for the period	(67.9)	(25.7)	18.1
Less: amortization of unrecognized losses, transition obligation and prior service cost included in net income	7.7	7.5	10.8
Less: settlement and curtailment losses included in net income	0.7	0	1.4
Other	(3.4)	2.4	(1.6)
Defined benefit pension and other postretirement plans, Income tax effect	1.9	(1.5)	(5.5)
Defined benefit pension and other postretirement plans, Net of tax	(61.0)	(17.3)	23.2
Other comprehensive (loss) income, Net of tax	(63.4)	(109.2)	59.5
Total comprehensive income	401.2	442.3	340.7
Less: comprehensive income attributable to noncontrolling interest	16.8	16.7	22.0
Comprehensive Income Attributable to IPG	$ 384.4	$ 425.6	$ 318.7

Summary of Significant Accounting Policies (Notes)

12 Months Ended

Dec. 31, 2012

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

Business Description

The Interpublic Group of Companies, Inc. and subsidiaries (the “Company,” “IPG,” “we,” “us” or “our”) is one of the world’s premier global advertising and marketing services companies. Our agencies create customized marketing programs for clients that range in scale from large global marketers to regional and local clients. Comprehensive global services are critical to effectively serve our multinational and local clients in markets throughout the world, as they seek to build brands, increase sales of their products and services and gain market share in an increasingly complex and fragmented media landscape.

Principles of Consolidation

The Consolidated Financial Statements include the accounts of the Company and its consolidated subsidiaries, some of which are not wholly owned. Investments in companies over which we do not have control, but the ability to exercise significant influence, are accounted for using the equity method of accounting. Investments in companies over which we have neither control nor have the ability to exercise significant influence are accounted for under the cost method. All intercompany accounts and transactions have been eliminated in consolidation.

We have consolidated certain entities meeting the definition of variable interest entities, and the inclusion of these entities does not have a material impact on our Consolidated Financial Statements.

Reclassifications

Certain reclassifications have been made to the prior period financial statements to conform to the current-year presentation.

Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”) requires us to make judgments, assumptions and estimates that affect the amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the reporting date and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from these estimates and assumptions.

Revenue Recognition

Our revenues are primarily derived from the planning and execution of multi-channel advertising, marketing and communications programs around the world. Our revenues are directly dependent upon the advertising, marketing and corporate communications requirements of our existing clients and our ability to win new clients. Our revenue is typically lowest in the first quarter and highest in the fourth quarter. This reflects the seasonal spending of our clients, incentives earned at year end on various contracts and project work completed that is typically recognized during the fourth quarter.

Most of our client contracts are individually negotiated and, accordingly, the terms of client engagements and the bases on which we earn commissions and fees vary significantly. As is customary in the industry, our contracts generally provide for termination by either party on relatively short notice, usually 90 days.

Our client contracts are complex arrangements that may include provisions for incentive compensation and vendor rebates and credits. Our largest clients are multinational entities and, as such, we often provide services to these clients out of multiple offices and across many of our agencies. In arranging for such services, it is possible that we will enter into global, regional and local agreements. Agreements of this nature are reviewed by legal counsel to determine the governing terms to be followed by the offices and agencies involved.

Revenue for our services is recognized when all of the following criteria are satisfied: (i) persuasive evidence of an arrangement exists; (ii) the price is fixed or determinable; (iii) collectability is reasonably assured; and (iv) services have been performed. Depending on the terms of a client contract, fees for services performed can be recognized in three principal ways: proportional performance (input or output), straight-line (or monthly basis) or completed contract.

•

Fees are generally recognized as earned based on the proportional performance input method of revenue recognition in situations where our fee is reconcilable to the actual hours incurred to service the client as detailed in a contractual staffing plan, where the fee is earned on a per hour basis or where actual hours incurred are provided to the client on a periodic basis (whether or not the fee is reconcilable), with the amount of revenue recognized in these situations limited to the amount realizable under the client contract. We believe an input-based measure (the ‘hour’) is appropriate in situations where the client arrangement essentially functions as a time and out-of-pocket expense contract and the client receives the benefit of the services provided throughout the contract term.


•	Fees are recognized on a straight-line or monthly basis when service is provided essentially on a pro-rata basis and the terms of the contract support monthly basis accounting.

•

Certain fees (such as for major marketing events) are deferred until contract completion if the final act is so significant in relation to the service transaction taken as a whole or if any of the terms of the contract do not otherwise qualify for proportional performance or monthly basis recognition. Fees may also be deferred and recognized upon delivery of a project if the terms of the client contract identify individual discrete projects.

Depending on the terms of the client contract, revenue is derived from diverse arrangements involving fees for services performed, commissions, performance incentive provisions and combinations of the three. Commissions are generally earned on the date of the broadcast or publication. Contractual arrangements with clients may also include performance incentive provisions designed to link a portion of our revenue to our performance relative to either qualitative or quantitative goals, or both. Performance incentives are recognized as revenue for quantitative targets when the target has been achieved and for qualitative targets when confirmation of the incentive is received from the client.

The majority of our revenue is recorded as the net amount of our gross billings less pass-through expenses charged to a client. In most cases, the amount that is billed to clients significantly exceeds the amount of revenue that is earned and reflected in our Consolidated Financial Statements because of various pass-through expenses, such as production and media costs. We assess whether our agency or the third-party supplier is the primary obligor, and we evaluate the terms of our client agreements as part of this assessment. In addition, we give appropriate consideration to other key indicators such as latitude in establishing price, discretion in supplier selection and credit risk to the vendor. Because we operate broadly as an advertising agency, based on our primary lines of business and given the industry practice to generally record revenue on a net versus gross basis, we believe that there must be strong evidence in place to overcome the presumption of net revenue accounting. Accordingly, we generally record revenue net of pass-through charges as we believe the key indicators of the business suggest we generally act as an agent on behalf of our clients in our primary lines of business. In those businesses where the key indicators suggest we act as a principal (primarily sales promotion and event, sports and entertainment marketing), we record the gross amount billed to the client as revenue and the related incremental direct costs incurred as office and general expenses. In general, we also report revenue net of taxes assessed by governmental authorities that are directly imposed on our revenue-producing transactions.

As we provide services as part of our core operations, we generally incur incidental expenses, which, in practice, are commonly referred to as “out-of-pocket” expenses. These expenses often include expenses related to airfare, mileage, hotel stays, out-of-town meals and telecommunication charges. We record the reimbursements received for such incidental expenses as revenue with a corresponding offset to office and general expense.

We receive credits from our vendors and media outlets for transactions entered into on behalf of our clients that, based on the terms of our contracts and local law, are either remitted to our clients or retained by us. If amounts are to be passed through to clients, they are recorded as liabilities until settlement or, if retained by us, are recorded as revenue when earned. Income or expense may also be realized in connection with differences resulting from settling vendor discount or credit liabilities that were established as part of the restatement we presented in our 2004 Annual Report on Form 10-K (the “2004 Restatement”). In these situations, or if we release certain of these credit liabilities when the statute of limitations has lapsed, given the historical nature of these liabilities, we generally record such items as other income, net as we do not consider these to be part of current operating results.

Cash and Cash Equivalents

Cash equivalents are highly liquid investments, which include certificates of deposit, government securities, commercial paper and time deposits with original maturities of three months or less at the time of purchase and are stated at estimated fair value, which approximates cost. Cash is maintained at multiple high-credit-quality financial institutions.

Short-Term Marketable Securities

Short-term marketable securities include investment-grade time deposits, commercial paper and government securities with maturities greater than three months but less than twelve months. These securities are classified as available-for-sale and are carried at fair value with net unrealized gains and losses reported as a component of accumulated other comprehensive loss, which is a component of stockholders’ equity. The cost of securities is determined based upon the average cost of the securities sold.

Allowance for Doubtful Accounts

The allowance for doubtful accounts is estimated based on the aging of accounts receivable, reviews of client credit reports, industry trends and economic indicators, as well as reviews of recent payment history for specific customers. The estimate is based largely on a formula-driven calculation but is supplemented with economic indicators and knowledge of potential write-offs of specific client accounts.

Expenditures Billable to Clients

Expenditures billable to clients are primarily comprised of production and media costs that have been incurred but have not yet been billed to clients, as well as fees that have been earned which have not yet been billed to clients. Unbilled amounts are presented in expenditures billable to clients regardless of whether they relate to our fees or production and media costs. A provision is made for unrecoverable costs as deemed appropriate.

Accounts Payable

Accounts payable includes all operating payables, including those related to all media and production costs. These payables are due within one year.

Investments

Our investments in publicly traded companies over which we do not exert a significant influence are classified as available-for-sale. These investments are reported at fair value based on quoted market prices with net unrealized gains and losses reported as a component of accumulated other comprehensive loss. Our non-publicly traded investments and all other publicly traded investments, including investments to fund certain deferred compensation and retirement obligations, are accounted for using the equity method or cost method. We do not disclose the fair value for equity method investments or investments held at cost as it is not practical to estimate fair value since there is no readily available market data and it is cost prohibitive to obtain independent valuations. We regularly review our equity and cost method investments to determine whether a significant event or change in circumstances has occurred that may impact the fair value of each investment. In the event a decline in fair value of an investment occurs, we determine if the decline has been other-than-temporary. We consider our investments strategic and long-term in nature, so we determine if the fair value decline is recoverable within a reasonable period. For our investments, we evaluate fair value based on specific information (valuation methodologies, estimates of appraisals, financial statements, etc.) in addition to quoted market price, if available. We consider all known quantitative and qualitative factors in determining if an other-than-temporary decline in value of an investment has occurred.

Derivatives

We are exposed to market risk related to interest rates, foreign currency rates and certain balance sheet items. From time to time we enter into derivative instruments for risk management purposes, and not for speculative purposes. All derivative instruments are recorded at fair value on our balance sheet. Changes in fair value are immediately included in earnings if the derivatives are not designated as a hedge instrument or if the derivatives do not qualify as effective hedges. For derivatives designated as hedge instruments, we evaluate for hedge accounting both at inception and throughout the hedge period. If a derivative is designated as a fair value hedge, then changes in the fair value of the derivative are offset against the changes in the fair value of the underlying hedged item. If a derivative is designated as a cash flow hedge, then the effective portion of the changes in the fair value of the derivative is recognized as a component of accumulated other comprehensive income and subsequently reclassified to earnings in our Consolidated Statement of Operations in the same period as the underlying hedged transaction affects earnings.

Furniture, Equipment and Leasehold Improvements

Furniture, equipment and leasehold improvements are stated at cost, net of accumulated depreciation. Furniture and equipment are depreciated generally using the straight-line method over the estimated useful lives of the related assets, which range from 3 to 7 years for furniture, equipment and computer software costs, 10 to 35 years for buildings and the shorter of the useful life or the remaining lease term for leasehold improvements.

Goodwill and Other Intangible Assets

We account for our business combinations using the acquisition accounting method, which requires us to determine the fair value of net assets acquired and the related goodwill and other intangible assets. Determining the fair value of assets acquired and liabilities assumed requires management's judgment and involves the use of significant estimates, including projections of future cash inflows and outflows, discount rates, asset lives and market multiples. Considering the characteristics of advertising, specialized marketing and communication services companies, our acquisitions usually do not have significant amounts of tangible assets, as the principal asset we typically acquire is creative talent. As a result, a substantial portion of the purchase price is allocated to goodwill and other intangible assets.

We review goodwill and other intangible assets with indefinite lives not subject to amortization as of October 1^st each year and whenever events or significant changes in circumstances indicate that the carrying value may not be recoverable. We evaluate the recoverability of goodwill at a reporting unit level. We have 11 reporting units that were subject to the 2012 annual impairment testing. During 2012, our reporting unit structure changed due to the creation of a new reporting unit which had been previously included within an existing reporting unit, as well as the disposal of a reporting unit. Our annual impairment review as of October 1, 2012 did not result in an impairment charge at any of our reporting units.

We review intangible assets with definite lives subject to amortization whenever events or circumstances indicate that a carrying amount of an asset may not be recoverable. Recoverability of these assets is determined by comparing the carrying value of these assets to the estimated undiscounted future cash flows expected to be generated by these assets. These assets are impaired when their carrying value exceeds their fair value. Impaired intangible assets with definite lives subject to amortization are written down to their fair value with a charge to expense in the period the impairment is identified. Intangible assets with definite lives are amortized on a straight-line basis with estimated useful lives generally between 7 and 15 years. Events or circumstances that might require impairment testing include the loss of a significant client, the identification of other impaired assets within a reporting unit, loss of key personnel, the disposition of a significant portion of a reporting unit, significant decline in stock price or a significant adverse change in business climate or regulations.

In 2011, we adopted new authoritative guidance for goodwill which permits an entity to first assess qualitative factors to determine whether the fair value of a reporting unit is “more likely than not” less than its carrying value. Qualitative factors to consider may include macroeconomic conditions, industry and market considerations, cost factors that may have a negative effect on earnings, overall financial performance of the reporting unit, and other relevant entity-specific events such as changes in management, key personnel, strategy or clients, as well as pending litigation. If, after assessing the totality of events or circumstances such as those described above, an entity determines that it is "more likely than not" that the fair value of a reporting unit is less than its carrying value, then the entity is required to perform the first step of a two-step quantitative impairment test to identify and measure impairment, if necessary. Otherwise, no additional testing is required.

For reporting units not included in the qualitative assessment, or for any reporting units identified in the qualitative assessment as "more likely than not" that the fair value is less than its carrying value, the first step of the quantitative impairment test is performed. For our annual impairment test, we compare the respective fair value of our reporting units' equity to the carrying value of their net assets. The first step is a comparison of the fair value of each reporting unit to its carrying value, including goodwill. The sum of the fair values of all our reporting units is reconciled to our current market capitalization plus an estimated control premium. Goodwill allocated to a reporting unit whose fair value is equal to or greater than its carrying value is not impaired, and no further testing is required. Should the carrying amount for a reporting unit exceed its fair value, then the first step of the quantitative impairment test is failed and the magnitude of any goodwill impairment is determined under the second step, which is a comparison of the implied fair value of a reporting unit's goodwill to its carrying value. The implied fair value of goodwill is the excess of the fair value of the reporting unit over its carrying value, excluding goodwill. Impaired goodwill is written down to its implied fair value with a charge to expense in the period the impairment is identified.

The fair value of a reporting unit for 2012 and 2011 was estimated using a combination of the income approach, which incorporates the use of the discounted cash flow method, and the market approach, which incorporates the use of earnings and revenue multiples based on market data.

Foreign Currencies

The functional currency of our foreign operations is generally their respective local currency. Assets and liabilities are translated at the exchange rates in effect at the balance sheet date, and revenues and expenses are translated at the average exchange rates during the period presented. The resulting translation adjustments are recorded as a component of accumulated other comprehensive loss in the stockholders’ equity section of our Consolidated Balance Sheets. Currency transaction gains or losses primarily arising from transactions in currencies other than the functional currency are included in office and general expenses. Foreign currency transactions resulted in a pre-tax gain of $1.2 in 2012 and pre-tax losses of $0.9 in 2011 and $0.7 in 2010.

We monitor the currencies of countries in which we operate in order to determine if the country should be considered a highly inflationary environment. A currency is determined to be highly inflationary when there is cumulative inflation of approximately 100% or more over a three-year period. If this occurs the functional currency of that country would be changed to our reporting currency, the U.S. Dollar, and foreign exchange gains or losses would be recognized on all monetary transactions, assets and liabilities in currencies other than the U.S. Dollar until the currency is no longer considered highly inflationary.

Income Taxes

The provision for income taxes includes U.S. federal, state, local and foreign taxes. Income taxes are accounted for under the liability method. Deferred tax assets and liabilities are recognized for the estimated future tax consequences of temporary differences between the financial statement carrying amounts and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the year in which the temporary differences are expected to be reversed. We evaluate the realizability of our deferred tax assets and establish a valuation allowance when it is “more likely than not” that all or a portion of the deferred tax assets will not be realized. We evaluate our tax positions using the “more likely than not” recognition threshold and then apply a measurement assessment to those positions that meet the recognition threshold. We have established tax reserves that we believe to be adequate in relation to the potential for additional assessments in each of the jurisdictions in which we are subject to taxation. We regularly assess the likelihood of additional tax assessments in those jurisdictions and adjust our reserves as additional information or events require.

Redeemable Noncontrolling Interests

Many of our acquisitions include provisions under which the noncontrolling equity owners can require us to purchase additional interests in a subsidiary at their discretion. Payments for these redeemable noncontrolling interests are contingent upon achieving projected operating performance targets and satisfying other conditions specified in the related agreements and are subject to revisions as the earn-out periods progress. We record these redeemable noncontrolling interests in “mezzanine equity” in our Consolidated Balance Sheets. Each reporting period, redeemable noncontrolling interests are reported at their estimated redemption value, but not less than their initial fair value. Any adjustment to the redemption value above initial value prior to exercise will also impact retained earnings or additional paid-in capital, but will not impact net income. Adjustments as a result of currency translation will affect the redeemable noncontrolling interest balance, but do not impact retained earnings or additional paid-in capital.

Earnings Per Share (“EPS”)

Basic EPS available to IPG common stockholders equals net income available to IPG common stockholders divided by the weighted-average number of common shares outstanding for the applicable period. Diluted EPS equals net income available to IPG common stockholders adjusted to exclude, if dilutive, preferred stock dividends, interest expense related to potentially dilutive securities calculated using the effective interest rate method and the benefit from the preferred stock repurchased, divided by the weighted-average number of common shares outstanding, plus any additional common shares that would have been outstanding if potentially dilutive shares had been issued.

Diluted EPS reflect the potential dilution that would occur if certain potentially dilutive securities or debt obligations were exercised or converted into common stock. The potential issuance of common stock is assumed to occur at the beginning of the year (or at the time of issuance of the potentially dilutive instrument, if later) and the incremental shares are included using the treasury stock or “if-converted” method. The proceeds utilized in applying the treasury stock method consist of the amount, if any, to be paid upon exercise and, as it relates to stock-based compensation, the amount of compensation cost attributed to future service not yet recognized and any tax benefits credited to additional paid-in-capital related to the exercise. These proceeds are then assumed to be used to purchase common stock at the average market price of our stock during the period. The incremental shares (difference between the shares assumed to be issued and the shares assumed to be purchased), to the extent they would have been dilutive, are included in the denominator of the diluted EPS calculation.

We may be required to calculate basic EPS using the two-class method, as a result of our redeemable noncontrolling interests. To the extent that the redemption value increases and exceeds the then-current fair value of a redeemable noncontrolling interest, net income available to IPG common stockholders (used to calculate EPS) could be negatively impacted by that increase, subject to certain limitations. The partial or full recovery of any reductions to net income available to IPG common stockholders (used to calculate EPS) is limited to any cumulative prior-period reductions. For the years ended December 31, 2012, 2011 and 2010, there was no impact to EPS for adjustments related to our redeemable noncontrolling interests.

Pension and Postretirement Benefits

We have pension and postretirement benefit plans covering certain domestic and international employees. We use various actuarial methods and assumptions in determining our net pension and postretirement benefit costs and obligations, including the discount rate used to determine the present value of future benefits, expected long-term rate of return on plan assets and healthcare cost trend rates. The overfunded or underfunded status of our pension and postretirement benefit plans is recorded on our Consolidated Balance Sheet.

Stock-Based Compensation

Compensation costs related to share-based transactions, including employee stock options, are recognized in the Consolidated Financial Statements based on fair value. Stock-based compensation expense is generally recognized ratably over the requisite service period based on the estimated grant-date fair value, net of estimated forfeitures.

Debt and Credit Arrangements

The entire disclosure for all significant accounting policies of the reporting entity.

+ References+ Details

Debt and Credit Arrangements (Notes)

12 Months Ended

Dec. 31, 2012

Debt Disclosure [Abstract]

Long-Term Debt

A summary of the carrying amounts and fair values of our long-term debt is listed below.



	Effective Interest Rate		December 31,
			2012				2011
			Book Value		Fair Value ¹		Book Value		Fair Value
6.25% Senior Unsecured Notes due 2014 (less unamortized discount of $0.2)	6.29	%	$	352.8	$	372.6	$	354.3	$	374.5
10.00% Senior Unsecured Notes due 2017 (less unamortized discount of $8.1)	10.38	%	591.9		660.8		590.6		690.0
2.25% Senior Notes due 2017 (less unamortized discount of $0.7)	2.30	%	299.3		297.8		0.0		0.0
4.00% Senior Notes due 2022 (less unamortized discount of $2.9)	4.13	%	247.1		258.7		0.0		0.0
3.75% Senior Notes due 2023 (less unamortized discount of $1.5)	4.32	%	498.5		499.7		0.0		0.0
4.75% Convertible Senior Notes due 2023 (plus unamortized premium of $0.5) ²	3.50	%	200.5		202.8		202.7		220.5
4.25% Convertible Senior Notes due 2023			0.0		0.0		403.0		405.5
Other notes payable and capitalized leases			87.3		90.8		65.1
Total long-term debt			2,277.4				1,615.7
Less: current portion ³			216.6				404.8
Long-term debt, excluding current portion			$	2,060.8			$	1,210.9


¹	See Note 11 for information on the fair value measurement of our long-term debt.


²	See Note 17 for further information regarding subsequent events.

Annual maturities are scheduled as follows based on the book value as of December 31, 2012.



2013 ¹	$	16.1
2014	352.8
2015	0.1
2016	0.1
2017	913.8
Thereafter	994.5
Total long-term debt	$	2,277.4


¹	Holders of our 4.75% Notes may require us to repurchase their notes for cash, stock or a combination, at our election, at par in March 2013.

For those debt securities that have a premium or discount at the time of issuance, we amortize the amount through interest expense based on the maturity date or the first date the holders may require us to repurchase the debt securities, if applicable. A premium would result in a decrease in interest expense and a discount would result in an increase in interest expense in future periods. We also have recorded debt issuance costs related to certain financing transactions in other assets in our Consolidated Balance Sheets, which are also amortized through interest expense. As of December 31, 2012 and 2011, we had unamortized debt issuance costs of $27.5 and $25.5, respectively.

Our debt securities include covenants that, among other things, limit our liens and the liens of certain of our consolidated subsidiaries, but do not require us to maintain any financial ratios or specified levels of net worth or liquidity.

Debt Transactions

2.25% Senior Notes due 2017

In November 2012, we issued $300.0 in aggregate principal amount of 2.25% Senior Notes due 2017 (the "2.25% Notes") at a discount to par. As a result, the 2.25% Notes were reflected on our Consolidated Balance Sheet at a fair value of $299.3 at issuance. The discount of $0.7 is amortized through the maturity date of November 15, 2017. Interest is payable semi-annually in arrears on May 15^th and November 15^th of each year, commencing on May 15, 2013. Capitalized fees of $2.1 related to the issuance of the 2.25% Notes, including commissions and offering expenses, are amortized in interest expense through the maturity date.

3.75% Senior Notes due 2023

In November 2012, we issued $500.0 in aggregate principal amount of 3.75% Senior Notes due 2023 (the "3.75% Notes") at a discount to par. As a result, the 3.75% Notes were reflected on our Consolidated Balance Sheet at a fair value of $498.5 at issuance. The discount of $1.5 is amortized through the maturity date of February 15, 2023. Interest is payable semi-annually in arrears on February 15^th and August 15^th of each year, commencing on August 15, 2013. Capitalized fees of $3.8 related to the issuance of the 3.75% Notes, including commissions and offering expenses, are amortized in interest expense through the maturity date.

We intend to apply the net proceeds from the sale of the 2.25% and 3.75% Notes towards the redemption of $200.0 in aggregate principal amount of our 4.75% Notes and $600.0 in aggregate principal amount of our 10.00% Senior Notes due 2017 (the "10.00% Notes"). We have the option to redeem the 4.75% Notes at par plus accrued interest at any time on or after March 15, 2013. We have the option to redeem the 10.00% Notes at par plus a "make-whole" amount and accrued and unpaid interest at any time prior to July 15, 2013, and at 105% of their principal amount plus accrued and unpaid interest at any time on or after that date.

4.00% Senior Notes due 2022

In March 2012, we issued $250.0 in aggregate principal amount of 4.00% Senior Notes due 2022 (the "4.00% Notes") at a discount to par. As a result, the 4.00% Notes were reflected on our Consolidated Balance Sheet at a fair value of $246.8 at issuance. The discount of $3.2 is amortized through the maturity date of March 15, 2022. Interest is payable semi-annually in arrears on March 15^th and September 15^th of each year, commencing on September 15, 2012. Capitalized fees, including commissions and offering expenses, of $2.5 related to the issuance of the 4.00% Notes are amortized in interest expense through the maturity date. We applied the net proceeds towards the repurchase and redemption of our 4.25% Notes as described below.

Consistent with our other debt securities, the 2.25% Notes, the 3.75% Notes and the 4.00% Notes include covenants that, among other things, limit our liens and the liens of certain of our consolidated subsidiaries, but do not require us to maintain any financial ratios or specified levels of net worth or liquidity.

At any time, at our option, we may redeem all or some of the 2.25% Notes, the 3.75% Notes and the 4.00% Notes at the greater of the principal amount of the notes to be redeemed and a "make-whole" amount, plus, in either case, accrued and unpaid interest to the date of redemption. If we experience a change of control event, coupled with a specified downgrade in the credit rating of the applicable series, we must offer to repurchase each series of these notes in cash at a price equal to not less than 101% of the aggregate principal amount of such notes, plus accrued and unpaid interest to the date of repurchase.

4.25% Convertible Senior Notes due 2023

In March 2012, we retired $400.0 in aggregate principal amount of our 4.25% Notes. Of the amount retired, $399.6 in aggregate principal amount was redeemed or repurchased for cash at par plus accrued interest of $0.5. The remaining $0.4 in aggregate principal amount of our 4.25% Notes was converted, at the election of the 4.25% Note holders, into Interpublic common stock at a conversion rate of 82.4612 shares (actual number) per $1,000 (actual number) principal amount of the 4.25% Notes, or approximately 30,000 shares (actual number). The retirement of our 4.25% Notes eliminates approximately 33.0 shares of common stock from our eligible diluted share count annually.

7.25% Senior Unsecured Notes due 2011

In August 2011, the remaining $36.3 aggregate principal amount of our 7.25% Senior Unsecured Notes due 2011 matured, and we paid $37.6 in cash, including accrued and unpaid interest.

Convertible Senior Notes

Conversion Features

Our 4.75% Notes are convertible into our common stock. The conversion rate of our 4.75% Notes is subject to adjustment in specified circumstances, including any payment of cash dividends on our common stock. The conversion rate of our 4.75% Notes is also subject to adjustment for certain events arising from stock splits and combinations, stock dividends and certain other actions by us that modify our capital structure. The 4.75% Notes provide for an additional “make-whole” adjustment to the conversion rate in the event of a change of control meeting specified conditions.

Our 4.75% Notes are convertible at any time if the average price of our common stock for 20 trading days immediately preceding the conversion date is greater than or equal to a specified percentage of the conversion price; this percentage was equal to 115.5% in 2012 and declines 0.5% each year until it reaches 110% at maturity. Our 4.75% Notes are also convertible, regardless of the price of our common stock, if: (i) we call the 4.75% Notes for redemption; (ii) we make specified distributions to shareholders; (iii) we become a party to a consolidation, merger or binding share exchange pursuant to which our common stock would be converted into cash or property (other than securities); or (iv) the credit ratings assigned to the 4.75% Notes by any two of Moody’s Investor Service, Standard and Poor’s and Fitch Ratings are lower than Ba2, BB and BB, respectively, or the 4.75% Notes are no longer rated by at least two of these ratings services. As of December 31, 2012, our 4.75% Notes were not convertible based on the triggers listed above. As a result of certain conversion features, our 4.75% Notes contain embedded derivatives whose fair values as of December 31, 2012 and 2011 were negligible. Our 4.75% Notes are also convertible, whether or not the above conditions are met, from February 15, 2023 to March 15, 2023. The 4.75% Notes are not considered securities with participation rights in earnings available to IPG common stockholders as there are no features attached to these securities that allow holders to participate in our undistributed earnings.

The conversion rates, corresponding conversion prices and conversion shares for our 4.75% Notes are listed below.



	December 31,
	2012		2011		2010
Conversion price	$	11.86	$	12.13	$	12.42
Conversion rate per note (actual number)	84.3402		82.4612		80.5153
Conversion shares	16.9		16.5		16.1

During 2012 and 2011, the conversion rate for our 4.75% Notes was adjusted as a result of the cumulative effect of the cash dividends declared and paid on our common stock, which resulted in a corresponding adjustment of the conversion price and conversion shares.

Repurchase / Redemption Options

Holders of our 4.75% Notes may require us to repurchase their notes on March 15, 2013 or March 15, 2018, for cash, common stock or a combination of cash and common stock, at our election. Additionally, investors may require us to repurchase our 4.75% Notes in the event of certain change of control events that occur prior to March 15, 2013, for cash, common stock or a combination of cash and common stock, at our election. At our option, we may redeem our 4.75% Notes for cash on or after March 15, 2013. The redemption price in each of these instances will be 100% of the principal amount of the 4.75% Notes being redeemed, plus accrued and unpaid interest, if any.

Capped Call

In November 2010, we purchased capped call options to hedge the risk of price appreciation on the shares of our common stock into which our 4.75% Notes are convertible. The strike price and cap price related to the capped call options are listed below.



	December 31,
	2012		2011		2010
Strike price	$	11.86	$	12.13	$	12.42
Cap price	$	17.43	$	17.83	$	18.26

During 2012 and 2011, the strike price and cap price related to the capped call options were adjusted due to the payment of cash dividends on our common stock. As of December 31, 2012, the options give us the right to purchase up to 16.9 shares of our common stock at the strike price, except that the net proceeds of exercising the options will not exceed the difference between $17.43 and $11.86. Subject to certain limitations, we may elect settlement of the options to occur in cash or in shares. The options will expire on April 2, 2013. During 2010, we paid an aggregate premium of $22.8 for the options, which was recorded as a reduction to additional paid-in capital in the Consolidated Balance Sheet.

Interest Rate Swaps

We enter into interest rate swaps to manage our exposure to changes in interest rates. In March and April of 2012, we entered into forward-starting interest rate swap agreements with an aggregate notional amount of $300.0 to effectively lock in the benchmark rate for a forecasted issuance of debt to occur prior to December 31, 2013. These swaps qualified for hedge accounting as cash flow hedges, and, as such, the effective portion of the losses on the swaps was recorded in other comprehensive income and the ineffective portion of the losses on the swaps was recorded in other income, net. In November 2012, we terminated these swaps when we issued our 3.75% Notes. We paid $24.0 in cash to settle the swaps, which is classified under the financing section of our Consolidated Statements of Cash Flows, and recognized a charge of $2.1, which was included as a component of other income, net in our Consolidated Statement of Operations. The deferred losses on the swaps of $21.9 will be amortized as an increase to interest expense over the term of the 3.75% Notes.

For the year ended December 31, 2012, we reclassified $0.3 from accumulated other comprehensive loss into interest expense. Within the next twelve months, we expect to reclassify approximately $1.7 from accumulated other comprehensive loss into interest expense in our Consolidated Statement of Operations.

Credit Agreements

We maintain a committed corporate credit facility (the "Credit Agreement") and uncommitted credit facilities with various banks that permit borrowings at variable interest rates. As of December 31, 2012 and 2011, there were no borrowings under our committed corporate credit facility. However, there were borrowings under the uncommitted facilities made by several of our international subsidiaries. We have guaranteed the repayment of some of these borrowings made by certain subsidiaries. The weighted-average interest rate on outstanding balances under the uncommitted credit facilities as of December 31, 2012 and 2011 was approximately 4.0% and 5.0%, respectively.

A summary of our credit facilities is presented below.



	December 31,
	2012								2011
	Total Facility		Amount Outstanding		Letters of Credit		Total Available		Total Facility		Amount Outstanding		Letters of Credit		Total Available
Committed credit agreement	$	1,000.0	$	0.0	$	15.1	$	984.9	$	1,000.0	$	0.0	$	16.2	$	983.8
Uncommitted credit agreements	$	317.2	$	172.1	$	3.3	$	141.8	$	458.3	$	153.5	$	2.6	$	302.2

In May 2011, we entered into an amendment and restatement of our Credit Agreement, increasing the commitments of the lenders to $1,000.0 from $650.0, and extending the Credit Agreement's expiration to May 31, 2016. The amendments modified our financial covenants, and provided additional flexibility with respect to, or eliminated, certain covenants such as restrictions on acquisitions, capital expenditures and restricted payments. In addition, the cost structure was reduced. The Credit Agreement is a revolving facility, under which amounts borrowed by us or any of our subsidiaries designated under the Credit Agreement may be repaid and reborrowed, subject to an aggregate lending limit of $1,000.0 or the equivalent in other currencies. The aggregate available amount of letters of credit outstanding may decrease or increase, subject to a sublimit on letters of credit of $200.0 or the equivalent in other currencies. Our obligations under the Credit Agreement are unsecured.

Under the Credit Agreement, we can elect to receive advances bearing interest based on either the base rate or the Eurocurrency rate (each as defined in the Credit Agreement) plus an applicable margin that is determined based on our credit ratings. As of December 31, 2012, the applicable margin is 0.40% for base rate advances and 1.40% for Eurocurrency rate advances. Letter of credit fees accrue on the average daily aggregate amount of letters of credit outstanding, at a rate equal to the applicable margin for Eurocurrency rate advances, and fronting fees accrue on the aggregate amount of letters of credit outstanding at an annual rate of 0.25%. We also pay a facility fee at an annual rate of 0.35% on the aggregate lending commitment under the Credit Agreement.

The Credit Agreement includes covenants that, among other things, limit our liens and the liens of our consolidated subsidiaries and limit subsidiary debt, as well as financial covenants. The financial covenants in the Credit Agreement require that we maintain, as of the end of each fiscal quarter, certain financial measures for the four quarters then ended.

In November 2012, we entered into an amendment to our Credit Agreement, which modified the definition of “Total Debt” in the Credit Agreement to disregard until August 15, 2013 the $300.0 in aggregate principal amount of the 2.25% Notes and the $500.0 in aggregate principal amount of the 3.75% Notes we issued in November 2012, subject to the reduction of this disregarded amount by the amount of any reductions in the outstanding aggregate principal amount of the 4.75% Notes or the 10.00% Notes. As a result of this amendment, these notes will have no impact on our financial covenants in the Credit Agreement until August 15, 2013.

The table below sets forth the financial covenants in effect as of December 31, 2012 and thereafter.



Interest coverage ratio (not less than): ¹		5.00x
Leverage ratio (not greater than): ²		2.75x


¹	The interest coverage ratio is defined as EBITDA, as defined in the Credit Agreement, to net interest expense plus cash dividends on convertible preferred stock for the four quarters then ended.


²	The leverage ratio is defined as debt as of the last day of such fiscal quarter to EBITDA, as defined in the Credit Agreement, for the four quarters then ended.

We were in compliance with all of our covenants in the Credit Agreement as of December 31, 2012.

Cash Pooling

We aggregate our domestic cash position on a daily basis. Outside the United States we use cash pooling arrangements with banks to help manage our liquidity requirements. In these pooling arrangements, several IPG agencies agree with a single bank that the cash balances of any of the agencies with the bank will be subject to a full right of set-off against amounts the other agencies owe the bank, and the bank provides for overdrafts as long as the net balance for all the agencies does not exceed an agreed-upon level. Typically, each agency pays interest on outstanding overdrafts and receives interest on cash balances. Our Consolidated Balance Sheets reflect cash, net of bank overdrafts, under all of our pooling arrangements, and as of December 31, 2012 and 2011 the amounts netted were $1,166.3 and $1,106.6, respectively.

Features of Convertible Preferred Stock [Abstract]

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References+ Details

Convertible Preferred Stock

12 Months Ended

Dec. 31, 2012

Preferred Stock

Convertible Preferred Stock

Each share of our 5¹/4% Series B Cumulative Convertible Perpetual Preferred Stock (the “Series B Preferred Stock”) has a liquidation preference of $1,000 per share and is convertible at the option of the holder at any time into shares of our common stock, subject to adjustment upon the occurrence of certain events, including the payment of cash dividends on our common stock. The Series B Preferred Stock may be converted at our option if the closing price of our common stock multiplied by the conversion rate in effect at that time equals or exceeds 130% of the liquidation preference for 20 trading days during any consecutive 30 trading day period. Holders of the Series B Preferred Stock will be entitled to an adjustment to the conversion rate if they convert their shares in connection with a fundamental change satisfying certain specified conditions. The Series B Preferred Stock is junior to all of our existing and future debt obligations and senior to our common stock with respect to payments of dividends and rights upon liquidation, winding up or dissolution, to the extent of the liquidation preference.

The number of shares outstanding, conversion rates and corresponding conversion prices and conversion shares for our Series B Preferred Stock are listed below.



	December 31,
	2012		2011		2010
Shares outstanding (actual number)	221,474		221,474		221,474
Conversion rate per share	76.2197		74.4500		73.1904
Conversion price	$	13.12	$	13.43	$	13.66
Conversion shares	16.9		16.5		16.2

During 2012 and 2011, the conversion rate per share for our Series B Preferred Stock was adjusted as a result of the cumulative effect of certain cash dividends declared and paid on our common stock during the year, which resulted in a corresponding adjustment of the conversion price and conversion shares. In 2010, we launched a tender offer and purchased 303,526 shares (actual number) of our Series B Preferred Stock for cash for an aggregate purchase price of $267.6. The aggregate purchase price was calculated as the number of shares tendered multiplied by the purchase price of $869.86 per share plus unpaid dividends of $1.9, which were prorated for the period the tendered shares were outstanding, and transaction costs directly associated with the repurchase. The carrying value of the tendered shares was $293.3 and was determined based on the number of shares tendered multiplied by the liquidation preference, less the pro-rata amount of issuance costs associated with the original issuance of the preferred stock. A benefit of $25.7, representing the excess carrying value of the tendered shares over consideration from the repurchase, was recorded as an adjustment to additional paid-in capital. Additionally, the pro-rata amount of issuance costs of $10.2 was recorded as an adjustment to additional paid-in capital.

The terms of our Series B Preferred Stock do not permit us to pay dividends on our common stock unless all accumulated and unpaid dividends on the Series B Preferred Stock have been or contemporaneously are declared and paid, or provision for the payment thereof has been made. We declared annual dividends of $52.50 per share, or $11.6, $11.6 and $15.6, on our Series B Preferred Stock during 2012, 2011 and 2010, respectively. Regular quarterly dividends, if declared, are $13.125 per share. Dividends on each share of Series B Preferred Stock are payable quarterly in cash or, if certain conditions are met, in common stock, at our option on January 15, April 15, July 15 and October 15, or the next business date if these dates fall on the weekend or a holiday, of each year. Dividends on our Series B Preferred Stock are cumulative from the date of issuance and are payable on each payment date to the extent that we have assets that are legally available to pay dividends and our Board of Directors, or an authorized committee of our Board, declares a dividend payable.

The terms of the Series B Preferred Stock include an embedded derivative instrument, the fair value of which as of December 31, 2012 and 2011 was negligible. The Series B Preferred Stock is not considered a security with participation rights in earnings available to IPG common stockholders due to the contingent nature of the conversion feature of these securities.

Earnings Per Share (Notes)

12 Months Ended

Dec. 31, 2012

Earnings Per Share [Abstract]

Earnings Per Share

The following sets forth basic and diluted earnings per common share available to IPG common stockholders.



	Years ended December 31,
	2012		2011		2010
Net income available to IPG common stockholders - basic	$	435.1	$	520.7	$	271.2
Adjustments: Effect of dilutive securities
Interest on 4.25% Notes ¹	0.3		1.4		1.4
Interest on 4.75% Notes	4.1		4.1		4.0
Dividends on preferred stock	11.6		11.6		0.0
Benefit from preferred stock repurchased ²	0.0		0.0		(21.7		)
Net income available to IPG common stockholders - diluted	$	451.1	$	537.8	$	254.9


Weighted-average number of common shares outstanding - basic	432.5		465.5		473.6
Add: Effect of dilutive securities
Restricted stock, stock options and other equity awards	7.2		9.1		11.3
4.25% Notes ¹	7.9		33.0		32.2
4.75% Notes	16.9		16.5		16.1
Preferred stock outstanding	16.9		16.5		0.0
Preferred stock repurchased	0.0		0.0		8.9

Weighted-average number of common shares outstanding - diluted	481.4		540.6		542.1


Earnings per share available to IPG common stockholders - basic	$	1.01	$	1.12	$	0.57
Earnings per share available to IPG common stockholders - diluted	$	0.94	$	0.99	$	0.47


¹	We retired all of our outstanding 4.25% Notes in March 2012. For purposes of calculating diluted earnings per share for 2012, the potentially dilutive shares are pro-rated based on the period they were outstanding.

For the year ended December 31, 2010, the benefit from the preferred stock repurchased is excluded from net income available to IPG common stockholders for purposes of calculating diluted earnings per share since the associated common shares, if converted, were dilutive. In addition, the benefit is also net of $4.0 of preferred dividends that were declared during the first quarter of 2010 and associated with the preferred stock repurchased.

The following table presents the potential shares excluded from the diluted earnings per share calculation because the effect of including these potential shares would be antidilutive.



	Years ended December 31,
	2012	2011	2010
Preferred stock outstanding	0.0	0.0	16.2
Securities excluded from the diluted earnings per share calculation because the exercise price was greater than the average market price:
Stock options ¹	6.6	8.9	15.6


¹	These options are outstanding at the end of the respective periods. In any period in which the exercise price is less than the average market price, these options have the potential to be dilutive, and application of the treasury stock method would reduce this amount.

The entire disclosure for earnings per share.

+ References+ Details

Supplementary Data (Notes)

12 Months Ended

Dec. 31, 2012

Supplementary Data [Abstract]

Supplementary Data

Valuation and Qualifying Accounts – Allowance for Uncollectible Accounts Receivable



	Years ended December 31,
	2012			2011			2010
Balance at beginning of period	$	55.4		$	63.1		$	66.0
Charges to costs and expenses	16.3			10.4			10.7
Reversals to other accounts¹	(0.2		)	(0.5		)	(0.4		)
Deductions:
Dispositions	(0.4		)	0.0			(0.5		)
Uncollectible accounts written off	(12.6		)	(16.3		)	(11.8		)
Foreign currency translation adjustment	0.5			(1.3		)	(0.9		)
Balance at end of period	$	59.0		$	55.4		$	63.1


¹	Amounts primarily relate to miscellaneous other amounts and reclassifications.

Furniture, Equipment and Leasehold Improvements, net



	December 31,
	2012			2011
Furniture and equipment	$	932.6		$	881.5
Leasehold improvements	597.2			593.0
Land and buildings	109.9			111.6
	1,639.7			1,586.1
Less: accumulated depreciation	(1,134.9		)	(1,126.3		)
Total furniture, equipment and leasehold improvements, net	$	504.8		$	459.8

The total depreciation and amortization expense for the years ended December 31, 2012, 2011 and 2010 was $124.3, $130.7 and $129.0, respectively.

Accrued Liabilities

The following table presents the components of accrued liabilities.



	December 31,
	2012		2011
Salaries, benefits and related expenses	$	478.2	$	520.6
Office and related expenses	51.6		57.9
Acquisition obligations	29.5		43.7
Interest	42.4		40.3
Professional fees	21.7		25.3
Other	104.8		142.2
Total accrued liabilities	$	728.2	$	830.0

2004 Restatement Liabilities

As part of the 2004 Restatement, we recognized liabilities related to vendor discounts and credits where we had a contractual or legal obligation to rebate such amounts to our clients or vendors. Reductions to these liabilities are achieved through settlements with clients and vendors, but also may occur if the applicable statute of limitations in a jurisdiction has lapsed. As of December 31, 2012 and 2011, we had vendor discounts and credit liabilities of $26.9 and $55.5, respectively, related to the 2004 Restatement.

Other Income, net

Results of operations include certain items that are not directly associated with our revenue-producing operations.



	Years ended December 31,
	2012			2011		2010
Gains on sales of businesses and investments	$	88.2		$	125.9	$	4.3
Vendor discounts and credit adjustments	15.3			19.4		12.7
Other (expense) income, net	(3.0		)	4.9		(4.1		)
Total other income, net	$	100.5		$	150.2	$	12.9

Sales of Businesses and Investments – This item primarily includes realized gains and losses relating to the sales of businesses and investments, cumulative translation adjustment balances from the liquidation of entities and sales of marketable securities and investments in publicly traded and privately held companies in our Rabbi Trusts. During 2012, we received net proceeds of $94.8 from the sale of our remaining holdings in Facebook and recorded a pre-tax gain of $93.6. Additionally, we recognized a gain relating to the sale of a business in an international market within our Constituency Management Group ("CMG") segment, which was partially offset by losses recognized relating to the sale of a business in an international market and the sale of a business in the domestic market within our Integrated Agency Networks ("IAN") segment, as well as an adjustment relating to a reserve for a change in estimate in connection with a business disposed of in a prior year. During 2011, we received net proceeds of $133.5 from the sale of approximately half of our holdings in Facebook and recorded a pre-tax gain of $132.2. Additionally, we recognized a loss relating to the sale of a business in the domestic market within our IAN segment. During 2010, we recognized a gain relating to the sale of a business in the domestic market within our CMG segment, which was partially offset by a loss recognized relating to the sale of one our European businesses within our IAN segment.

Vendor Discounts and Credit Adjustments – We are in the process of settling our liabilities related to vendor discounts and credits established as part of the 2004 Restatement. These adjustments reflect the reversal of certain of these liabilities as a result of differences resulting from settlements with clients or vendors or where the statute of limitations has lapsed.

Share Repurchase Program

In February 2012, our Board of Directors (the "Board") authorized a program to repurchase from time to time up to $300.0, excluding fees, of our common stock (the "2012 share repurchase program"). In November 2012, the Board authorized an increase in the amount available under our 2012 share repurchase program up to $400.0, excluding fees, of our common stock. In February 2011, the Board authorized a share repurchase program to repurchase from time to time up to $300.0, excluding fees, of our common stock (the "2011 share repurchase program"). In August 2011, the Board authorized an increase in the amount available under our 2011 share repurchase program up to $450.0, excluding fees, of our common stock, as a result of the sale of approximately half of our holdings in Facebook. We may effect such repurchases through open market purchases, trading plans established in accordance with SEC rules, derivative transactions or other means.

The following table presents our share repurchase activity under our share repurchase programs.



	Years ended December 31,
	2012		2011
Number of shares repurchased	32.7		41.7
Aggregate cost, including fees	$	350.5	$	400.8
Average price per share, including fees	$	10.72	$	9.62

As of December 31, 2012, $100.0 remains available for repurchase under the 2012 share repurchase program. The 2012 share repurchase program has no expiration date. We completed the 2011 share repurchase program in the first quarter of 2012.

Supplemental Cash Flow Information



	Years ended December 31,
	2012		2011		2010
Cash paid for interest	$	130.6	$	138.9	$	139.8
Cash paid for income taxes, net of refunds ¹	95.7		102.0		87.3


¹	Refunds of $23.5, $25.4 and $28.7 were received for the years ended December 31, 2012, 2011 and 2010, respectively.

Acquisitions (Notes)

12 Months Ended

Dec. 31, 2012

Business Combinations [Abstract]

Acquisitions

We continue to evaluate strategic opportunities to expand our industry expertise, strengthen our position in high-growth and key strategic geographical markets and industry sectors, advance technological capabilities and improve operational efficiency through both acquisitions and increased ownership interests in current investments. Our acquisitions typically provide for an initial payment at the time of closing and additional contingent purchase price payments based on the future performance of the acquired entity. We have entered into agreements that may require us to purchase additional equity interests in certain consolidated and unconsolidated subsidiaries. The amounts at which we record these transactions in our financial statements are based on estimates of the future financial performance of the acquired entity, the timing of the exercise of these rights, changes in foreign currency exchange rates and other factors.

For companies acquired, we estimate the fair values of the assets and liabilities based on 100% of the business for consolidation. The purchase price in excess of the estimated fair value of the tangible net assets acquired is allocated to identifiable intangible assets and then to goodwill. Due to the characteristics of advertising, specialized marketing and communication services companies, our acquisitions typically do not have significant amounts of tangible assets since the principal assets we acquire are client relationships and talent. As a result, a substantial portion of the purchase price is primarily allocated to customer lists, trade names and goodwill.

For acquisitions we record deferred payment and redeemable noncontrolling interest amounts on our Consolidated Balance Sheets based on their acquisition-date fair value. Deferred payments are recorded on a discounted basis and adjusted quarterly, if necessary, through operating income or net interest expense, depending on the nature of the arrangement, for both changes in estimate and accretion between the acquisition date and the final payment date. See Note 14 for further information on contingent acquisition obligations. Redeemable noncontrolling interests are adjusted quarterly to their estimated redemption value, but not less than their initial fair value. Any adjustments to the redemption value impacts retained earnings or additional paid-in capital, except for foreign currency translation adjustments. The following table presents changes in our redeemable noncontrolling interests.



	Years ended December 31,
	2012			2011			2010
Balance at beginning of period	$	243.4		$	291.2		$	277.8
Change in related noncontrolling interest balance	1.1			(7.7		)	1.5
Changes in redemption value of redeemable noncontrolling interests:
Additions	0.0			17.9			31.9
Redemptions and reclassifications	(14.2		)	(70.7		)	(30.1		)
Redemption value adjustments	(3.1		)	12.7			10.1
Balance at end of period	$	227.2		$	243.4		$	291.2

For all acquisitions, if a portion of the deferred payments and purchases of additional interests after the effective date of purchase are contingent upon employment terms, then that amount is accounted separately from the business combination and recognized as compensation expense over the required earn-out period. Payments deemed as compensation are excluded from the fair value purchase price allocation to tangible net assets and intangible assets acquired.

During 2012, we completed twelve acquisitions, eight of which were included in the IAN operating segment and four of which were included in the CMG operating segment. All acquired agencies have been integrated into one of our global networks or existing agencies. The most significant acquisitions included a healthcare market research and consulting agency and a search marketing agency in the United Kingdom, and, in the United States, a digital healthcare-marketing specialist and a designer of in-store shopping experiences. During 2012, we recorded approximately $201.0 of goodwill and intangible assets related to these acquisitions.

During 2011, we completed twenty-two acquisitions, which included purchases of controlling interests in previously unconsolidated subsidiaries. Of these acquisitions, eighteen were included in the IAN operating segment and four were included in the CMG operating segment. The most significant acquisitions included full service creative agencies in Australia, a public relations firm in Brazil, digital and direct marketing agencies in the United Kingdom, a healthcare communications firm in Germany and a social media agency in the United States. During 2011, we recorded approximately $133.0 of goodwill and intangible assets related to these acquisitions.

During 2010, we completed five acquisitions, four of which were included in the IAN operating segment and one of which was included in the CMG operating segment. During 2010, we recorded approximately $63.0 of goodwill and intangible assets related to these acquisitions.

The results of operations of our acquired companies were included in our consolidated results from the closing date of each acquisition. We did not make any payments in stock related to our acquisitions in 2012, 2011 or 2010.

Details of cash paid for current and prior years' acquisitions are listed below.



	Years ended December 31,
	2012			2011			2010
Cost of investment: current-year acquisitions	$	156.8		$	48.0		$	47.1
Cost of investment: prior-year acquisitions	40.6			105.1			49.6
Less: net cash acquired	(14.8		)	(18.5		)	(5.3		)
Total cost of investment ¹	182.6			134.6			91.4
Operating expense²	3.2			0.5			3.0

Total cash paid for acquisitions	$	185.8		$	135.1		$	94.4

Of the total cash paid, $37.1, $71.5 and $29.5 for the years ended December 31, 2012, 2011 and 2010, respectively, are classified under the financing section of the Consolidated Statements of Cash Flows within acquisition-related payments. These transactions relate to increases in our ownership interests in our consolidated subsidiaries as well as deferred payments for acquisitions that closed on or after January 1, 2009. Of the total cash paid, $145.5, $63.1 and $61.9 for the years ended December 31, 2012, 2011 and 2010, respectively, are classified under the investing section of the Consolidated Statements of Cash Flows within acquisitions, including initial payments for new transactions, net of cash acquired, and deferred payments for acquisitions that closed prior to January 1, 2009.


²	Represents cash payments made that were either in excess of the contractual value or contingent upon the future employment of the former owners of acquired companies.

The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).

Goodwill and Intangible Assets Disclosure [Abstract]

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+ Details

Intangible Assets

12 Months Ended

Dec. 31, 2012

Goodwill and Intangible Assets

Intangible Assets

Goodwill

Goodwill is the excess purchase price remaining from an acquisition after an allocation of purchase price has been made to identifiable assets acquired and liabilities assumed based on estimated fair values. The changes in the carrying value of goodwill for our segments, IAN and CMG, for the years ended December 31, 2012 and 2011 are listed below.



	IAN			CMG		Total ¹
Balance as of December 31, 2010	$	2,906.0		$	462.5	$	3,368.5
Current year acquisitions	68.5			28.4		96.9
Contingent and deferred payments for prior acquisitions	0.8			0.0		0.8
Other ²	(22.4		)	0.5		(21.9		)
Balance as of December 31, 2011	$	2,952.9		$	491.4	$	3,444.3
Current year acquisitions	122.0			11.7		133.7
Contingent and deferred payments for prior acquisitions	2.2			0.0		2.2
Other ²	(2.5		)	2.9		0.4
Balance as of December 31, 2012	$	3,074.6		$	506.0	$	3,580.6


¹	For all periods presented we have not recorded a goodwill impairment charge.


²	Primarily includes foreign currency translation adjustments.

See Note 1 for information regarding our annual impairment methodology.

Other Intangible Assets

Other intangible assets are comprised of assets with indefinite lives not subject to amortization and assets with definite lives subject to amortization. Other intangible assets primarily consist of customer lists and trade names, which have definitive lives and are subject to amortization on a straight-line basis with estimated useful lives generally between 7 and 15 years. Amortization expense for other intangible assets for the years ended December 31, 2012, 2011 and 2010 was $23.4, $20.2 and $19.4, respectively. During 2012 and 2011, we recorded approximately $67.0 and $36.0 of intangible assets related to acquisitions made in the respective year.

The following table provides a summary of other intangible assets, which are included in other assets on our Consolidated Balance Sheets.



	December 31,
	2012							2011
	Gross Amount		Accumulated Amortization			Net Amount		Gross Amount		Accumulated Amortization			Net Amount
Customer lists	$	184.0	$	(96.9	)	$	87.1	$	165.9	$	(81.7	)	$	84.2
Trade names	59.7		(15.5		)	44.2		52.9		(12.3		)	40.6
Other	15.1		(5.7		)	9.4		17.3		(7.8		)	9.5
Total	$	258.8	$	(118.1	)	$	140.7	$	236.1	$	(101.8	)	$	134.3

The estimated annual amortization expense for other intangible assets for the next five years as of December 31, 2012 is listed below.



	2013		2014		2015		2016		2017
Estimated amortization expense	$	29.9	$	29.8	$	26.1	$	15.2	$	5.5

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.

+ References+ Details

Income Taxes (Notes)

12 Months Ended

Dec. 31, 2012

Income Tax Disclosure [Abstract]

Income Taxes

The components of income before income taxes, equity earnings and the impact of noncontrolling interests are listed below.



	Years ended December 31,
	2012		2011		2010
Domestic	$	386.9	$	428.4	$	216.2
Foreign	287.9		310.0		234.4
Total	$	674.8	$	738.4	$	450.6

The provision for income taxes is listed below.



	Years ended December 31,
	2012			2011			2010
U.S. federal income taxes (including foreign withholding taxes):
Current	$	9.4		$	0.9		$	13.7
Deferred	118.1			92.3			60.2
	127.5			93.2			73.9
State and local income taxes:
Current	17.1			12.3			16.8
Deferred	25.3			11.3			(0.1		)
	42.4			23.6			16.7
Foreign income taxes:
Current	83.2			93.1			84.8
Deferred	(39.8		)	(19.7		)	(4.1		)
	43.4			73.4			80.7
Total	$	213.3		$	190.2		$	171.3

A reconciliation of the effective income tax rate before equity earnings and the impact of noncontrolling interests as reflected in our Consolidated Statements of Operations to the U.S. federal statutory income tax rate is listed below.



	Years ended December 31,
	2012			2011			2010
U.S. federal statutory income tax rate	35.0		%	35.0		%	35.0		%

Income tax provision at U.S. federal statutory rate	$	236.2		$	258.4		$	157.7
State and local income taxes, net of federal income tax benefit	27.3			15.3			10.8
Impact of foreign operations, including withholding taxes	8.4			(21.9		)	4.7
Change in net valuation allowance ¹	(57.3		)	(32.9		)	(2.4		)
Worthless securities deduction	0.0			(23.0		)	(2.5		)
Increases (decreases) in unrecognized tax benefits, net	24.1			(2.7		)	8.9
Other	(25.4		)	(3.0		)	(5.9		)
Provision for income taxes	$	213.3		$	190.2		$	171.3
Effective income tax rate on operations	31.6		%	25.8		%	38.0		%


¹	Reflects changes in valuation allowance that impacted the effective income tax rate for each year presented.

In 2012, our effective income tax rate of 31.6% was positively impacted by the reversals of valuation allowances associated with the Asia Pacific and Continental Europe regions, of $26.2 and $21.8, respectively, as well as by a benefit derived from the deduction of foreign tax credits that previously had a full valuation allowance. Our effective income tax rate was negatively impacted by an adjustment of $19.5 associated with the establishment of a previously unrecorded reserve for a tax contingency for the years 2007 through 2010, losses in certain foreign locations where we receive no tax benefit due to 100% valuation allowances and state and local income taxes, net of federal income tax benefit.

In 2011, our effective income tax rate of 25.8% was positively impacted primarily from the utilization of capital losses to offset nearly all of the $132.2 capital gain realized from the Facebook transaction. The capital gain enabled us to use capital loss carryforwards, on which a 100% valuation allowance had been previously established, and capital losses attributable to worthless securities in a consolidated subsidiary. Additionally, our effective income tax rate was positively impacted by the recognition of previously unrecognized tax benefits as a result of the effective settlement of the 2007-2008 IRS audit cycle, a lower effective income tax rate on non-U.S. operations and the net reversal of valuation allowances, primarily in the Continental Europe region. The effective income tax rate was negatively impacted by state and local taxes and losses in certain foreign locations where we receive no tax benefit due to 100% valuation allowances.

The components of deferred tax assets and liabilities are listed below.



	December 31,
	2012			2011
Postretirement/post-employment benefits	$	40.4		$	42.4
Deferred compensation	192.4			205.2
Pension costs	27.0			14.2
Basis differences in fixed assets	26.9			81.8
Rent	50.2			38.6
Interest	66.9			54.8
Accruals and reserves	51.1			55.6
Allowance for doubtful accounts	9.2			8.1
Basis differences in intangible assets	(364.9		)	(330.1		)
Investments in equity securities	(5.2		)	30.8
Tax loss/tax credit carry forwards	449.7			478.1
Restructuring and other reorganization-related costs	1.2			2.0
Other	88.3			92.2
Total deferred tax assets, net	633.2			773.7
Valuation allowance	(392.9		)	(489.9		)
Net deferred tax assets	$	240.3		$	283.8

We evaluate the realizability of our deferred tax assets on a quarterly basis. A valuation allowance is established when it is “more likely than not” that all or a portion of deferred tax assets will not be realized. In circumstances where there is negative evidence, establishment of a valuation allowance is considered. We believe that cumulative losses in the most recent three-year period represent significant negative evidence, and as a result, we determined that certain of our deferred tax assets required the establishment of a valuation allowance. The realization of our deferred tax assets is primarily dependent on future earnings. The amount of the deferred tax assets considered realizable could be reduced in the near future if estimates of future taxable income are lower than anticipated. The deferred tax assets for which an allowance was recognized relate primarily to state and foreign tax loss carryforwards.

The change in the valuation allowance is listed below.



	Years ended December 31,
	2012			2011			2010
Balance at beginning of period	$	489.9		$	508.1		$	425.5
(Reversed) charged to costs and expenses	(49.5		)	(25.1		)	92.3
Charged (reversed) to gross tax assets and other accounts	(47.5		)	6.9			(9.7		)
Balance at end of period	$	392.9		$	489.9		$	508.1

In 2012, amounts reversed to costs and expenses primarily relate to the net reversal of valuation allowances in the Asia Pacific and Continental Europe regions, based on positive evidence in the form of a sustained pattern of profitability. Amounts reversed to gross tax assets and other accounts relate primarily to the reversal of valuation allowance on foreign tax credits.

In 2011, amounts reversed to costs and expenses primarily relate to the utilization of capital loss carryforwards and the expiration of foreign tax credits on which 100% valuation allowances had been established, and the net reversal of valuation allowances based on positive evidence in the form of a sustained pattern of profitability. These reversals were partially offset by the establishment of an additional deferred tax asset and a corresponding valuation allowance for a Luxembourg tax loss carryforward.

In 2010, amounts charged to costs and expenses primarily relate to the establishment of a deferred tax asset and a corresponding valuation allowance for a Luxembourg tax loss carryforward, which were first available for effective utilization in 2011. This resulted from restructuring due to a tax law change in Luxembourg. Amounts reversed to gross tax assets and other accounts relate primarily to the effect of foreign currency translation.

As of December 31, 2012, there are $1,356.6 of loss carryforwards, of which $15.1 are U.S. tax loss carryforwards that expire in the years 2026 through 2029. The remaining $1,341.5 are non-U.S. tax loss carryforwards, of which $1,091.1 have unlimited carryforward periods and $250.4 have expiration periods from 2013 through 2031.

As of December 31, 2012 and 2011, we had $2,110.0 and $1,766.7, respectively, of undistributed earnings attributable to foreign subsidiaries. It is our intention to permanently reinvest undistributed earnings of our foreign subsidiaries. We have not provided deferred U.S. income taxes or foreign withholding taxes on temporary differences resulting from earnings for certain foreign subsidiaries which are permanently reinvested outside the U.S. It is not practicable to determine the amount of unrecognized deferred tax liability associated with these temporary differences.

The table below summarizes the activity related to our unrecognized tax benefits.



	December 31,
	2012			2011			2010
Balance at beginning of period	$	161.0		$	146.7		$	160.5
Increases as a result of tax positions taken during a prior year	28.2			5.3			4.6
Decreases as a result of tax positions taken during a prior year	(6.8		)	(18.1		)	(28.1		)
Settlements with taxing authorities	(0.7		)	(5.0		)	(10.2		)
Lapse of statutes of limitation	(1.1		)	(0.2		)	(0.6		)
Increases as a result of tax positions taken during the current year	14.0			32.3			20.5
Balance at end of period	$	194.6		$	161.0		$	146.7

Included in the total amount of unrecognized tax benefits of $194.6 as of December 31, 2012, is $193.5 of tax benefits that, if recognized, would impact the effective income tax rate. The total amount of accrued interest and penalties as of December 31, 2012 and 2011 is $13.5 and $12.1, respectively, of which a detriment of $1.4 and $0.2 is included in our 2012 and 2011 Consolidated Statements of Operations, respectively. In accordance with our accounting policy, interest and penalties accrued on unrecognized tax benefits are classified as income taxes in our Consolidated Statements of Operations.

In 2011, we effectively settled the 2007-2008 IRS audit cycle. The settlement resulted in no cash payment and our effective income tax rate was positively impacted by the recognition of previously unrecognized tax benefits.

We have various tax years under examination by tax authorities in various countries, and in various states, such as New York, in which we have significant business operations. It is not yet known whether these examinations will, in the aggregate, result in our paying additional taxes. We believe our tax reserves are adequate in relation to the potential for additional assessments in each of the jurisdictions in which we are subject to taxation. We regularly assess the likelihood of additional tax assessments in those jurisdictions and, if necessary, adjust our reserves as additional information or events require.

With respect to all tax years open to examination by U.S. federal, various state and local, and non-U.S. tax authorities, we currently anticipate that total unrecognized tax benefits will decrease by an amount between $30.0 and $40.0 in the next twelve months, a portion of which will affect our effective income tax rate, primarily as a result of the settlement of tax examinations and the lapsing of statutes of limitations. This net decrease is related to various items of income and expense, primarily transfer pricing adjustments.

We are effectively settled with respect to U.S. income tax audits for years prior to 2009. With limited exceptions, we are no longer subject to state and local income tax audits for years prior to 1999, or non-U.S. income tax audits for years prior to 2005.

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

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Accumulated Other Comprehensive Loss (Notes)

12 Months Ended

Dec. 31, 2012

Accumulated Other Comprehensive Loss, net of tax

Accumulated Other Comprehensive Loss, Net of Tax

The components of accumulated other comprehensive loss, net of tax are listed below.



	December 31,
	2012			2011			2010
Foreign currency translation adjustment	$	(130.1	)	$	(140.9	)	$	(51.3	)
Unrecognized losses, transition obligation and prior service cost	(146.0		)	(85.0		)	(67.7		)
Net unrealized losses on derivatives	(12.7		)	0.0			0.0
Net unrealized holding gains on securities	0.8			0.2			0.0
Accumulated other comprehensive loss, net of tax	$	(288.0	)	$	(225.7	)	$	(119.0	)

The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income.

Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]

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Incentive Compensation Plans (Notes)

12 Months Ended

Dec. 31, 2012

Incentive Compensation Plans

2009 Performance Incentive Plan

We issue stock and cash-based incentive awards to our employees under a plan established by the Compensation and Leadership Talent Committee of the Board of Directors (the “Compensation Committee”) and approved by our shareholders. In May 2009, our shareholders approved the 2009 Performance Incentive Plan (the “2009 PIP”), which replaced previous incentive plans. The number of shares of common stock initially available for granting new stock options and stock appreciation rights under the 2009 PIP was 8.1. The number of shares of common stock initially available for performance-based awards and other stock-based awards under the 2009 PIP was 26.5. Subject to the terms of the 2009 PIP, there are limits on the number of shares that may be awarded to any one participant for each type of award. The vesting period of awards granted is generally commensurate with the requisite service period. We generally issue new shares to satisfy the exercise of stock options or the distribution of other stock-based awards.

Additionally, under the 2009 PIP, we are able to grant performance cash awards. The performance cash awards are granted to certain employees who otherwise would have been eligible to receive performance-based stock awards. These awards have a service period vesting condition and a performance vesting condition. The amount of the performance cash award received by an employee with a performance vesting condition can range from 0% to 300% of the target amount of the original grant value. Performance cash awards generally vest in three years. A committee of the Board of Directors may grant performance cash awards to any eligible employee; however, no employee can receive more than $6.0 during a performance period. Performance cash awards may be settled in shares on the vest date. The number of shares to be settled on the vesting date will be calculated as the cash value adjusted for performance divided by our stock price on the vesting date.

The amount of stock-based compensation expense as reflected in salaries and related expenses in our Consolidated Statement of Operations, and the related tax benefit, are listed below.



	Years ended December 31,
	2012		2011		2010
Stock options	$	5.4	$	6.7	$	7.4
Stock-settled awards	14.9		21.9		32.7
Cash-settled awards	3.9		5.7		10.9
Performance-based awards	24.5		23.3		11.0
Employee stock purchase plan	0.6		0.7		0.5
Other ¹	1.1		4.1		4.3
Stock-based compensation expense	$	50.4	$	62.4	$	66.8
Tax benefit	$	19.7	$	22.1	$	22.1


1	Represents charges recorded for severance expense related to stock-based compensation awards.

Stock Options

Stock options are granted with the exercise price equal to the fair market value of our common stock on the grant date. They are generally exercisable between two and four years from the grant date and expire ten years from the grant date (or earlier in the case of certain terminations of employment).

The following tables are a summary of stock option activity during 2012.



	Options		Weighted- Average Exercise Price (per option)		Weighted- Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Stock options outstanding as of January 1, 2012	18.1		$12.10
Granted	0.6		11.65
Exercised	(1.2	)	9.43
Cancelled/expired	(3.0	)	25.20
Forfeited	(0.4	)	4.93
Stock options outstanding as of December 31, 2012	14.1		9.76		4.5	$	27.6
Stock options vested and expected to vest as of December 31, 2012	13.4		9.92		4.4	$	24.4
Stock options exercisable as of December 31, 2012	10.2		10.89		3.6	$	9.9

	Options		Weighted- Average Grant Date Fair Value (per option)		Weighted- Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Non-vested as of January 1, 2012	5.0		$	3.31
Granted	0.6		4.24
Vested	(1.3	)	3.94
Forfeited	(0.4	)	2.88
Non-vested as of December 31, 2012	3.9		3.29		7.0	$	18.0

There were 1.2, 1.3 and 0.5 stock options exercised in 2012, 2011 and 2010, respectively. The total intrinsic value of stock options exercised during 2012, 2011 and 2010 was $2.0, $3.2 and $0.6, respectively. The cash received from the stock options exercised in 2012, 2011 and 2010 was $11.7, $13.3 and $4.8, respectively. As of December 31, 2012, there was $4.2 of total unrecognized compensation expense related to non-vested stock options granted, which is expected to be recognized over a weighted-average period of 0.8 years.

We use the Black-Scholes option-pricing model to estimate the fair value of options granted, which requires the input of subjective assumptions including the option’s expected term and the price volatility of the underlying stock. Changes in the assumptions can materially affect the estimate of fair value and our results of operations could be materially impacted. The weighted-average grant-date fair value per option during the years ended December 31, 2012, 2011 and 2010 was $4.24, $4.57 and $3.88, respectively.

The fair value of each option grant has been estimated with the following weighted-average assumptions.



	Years ended December 31,
	2012		2011		2010
Expected volatility ¹	43.8	%	39.9	%	42.2	%
Expected term (years) ²	6.8		6.7		6.5
Risk free interest rate ³	1.3	%	2.8	%	3.0	%
Expected dividend yield ⁴	2.1	%	1.9	%	0.0	%


¹	The expected volatility used to estimate the fair value of stock options awarded is based on a blend of: (i) historical volatility of our common stock for periods equal to the expected term of our stock options and (ii) implied volatility of tradable forward put and call options to purchase and sell shares of our common stock.

The estimate of our expected term is based on the average of (i) an assumption that all outstanding options are exercised upon achieving their full vesting date and (ii) an assumption that all outstanding options will be exercised at the midpoint between the current date (i.e., the date awards have ratably vested through) and their full contractual term. In determining the estimate, we considered several factors, including the historical option exercise behavior of our employees and the terms and vesting periods of the options.


³	The risk free rate is determined using the implied yield currently available for zero-coupon U.S. government issuers with a remaining term equal to the expected term of the options.


⁴	The expected dividend yield is calculated based on an annualized dividend of $0.24 per share in 2012 and 2011. No dividend yield was assumed in 2010 because we did not pay cash dividends on our common stock during that year.

Stock-Based Compensation

We grant other stock-based compensation awards such as stock-settled awards, cash-settled awards and performance-based awards (settled in cash or shares) to certain key employees. The number of shares or units received by an employee for performance-based awards depends on Company performance against specific performance targets and could range from 0% to 300% of the target amount of shares originally granted. Incentive awards are subject to certain restrictions and vesting requirements as determined by the Compensation Committee. The fair value of the shares on the grant date is amortized over the vesting period, which is generally three years. Upon completion of the vesting period for cash-settled awards, the grantee is entitled to receive a payment in cash based on the fair market value of the corresponding number of shares of common stock. No monetary consideration is paid by a recipient for any incentive award. The fair value of cash-settled awards is adjusted each quarter based on our share price. The holders of stock-settled awards have absolute ownership interest in the underlying shares of common stock prior to vesting, which includes the right to vote and receive dividends. Dividends declared on common stock are accrued during the vesting period and paid when the award vests. The holders of cash-settled and performance-based awards have no ownership interest in the underlying shares of common stock until the awards vest and the shares of common stock are issued.

Stock-based compensation awards expected to be settled in cash have been classified as liabilities in our Consolidated Balance Sheets as of December 31, 2012 and 2011.



	Years ended December 31,
	2012		2011		2010
Stock-Settled Awards:
Awards granted	0.9		0.8		3.7
Weighted-average grant-date fair value (per award)	$	11.43	$	11.94	$	8.47
Total fair value of vested awards distributed	$	63.5	$	63.1	$	36.4
Cash-Settled Awards:
Awards granted	0.1		0.0		0.6
Weighted-average grant-date fair value (per award)	$	10.94	$	8.96	$	8.50
Total fair value of vested awards distributed	$	11.1	$	10.4	$	4.8
Performance-Based Awards:
Awards granted	1.8		1.8		0.1
Weighted-average grant-date fair value (per award)	$	10.61	$	11.58	$	11.02
Total fair value of vested awards distributed	$	11.5	$	30.8	$	4.6

In conjunction with common stock dividends declared in 2012 and 2011, we accrued dividends of $1.1 and $2.5, respectively, on non-vested stock-settled awards and paid $1.7 and $0.3 for stock-settled awards that vested during 2012 and 2011, respectively.

A summary of the activity of our non-vested stock-settled awards, cash-settled awards, and performance-based awards during 2012 is presented below (performance-based awards are shown at 100% of the shares originally granted).



	Stock-Settled Awards					Cash-Settled Awards					Performance-Based Awards
	Awards			Weighted- Average Grant-Date Fair Value (per award)		Awards			Weighted- Average Grant-Date Fair Value (per award)		Awards			Weighted- Average Grant-Date Fair Value (per award)
Non-vested as of January 1, 2012	9.2			$	6.41	1.6			$	5.85	2.0			$	10.84
Granted	0.9			11.43		0.1			10.94		1.8			10.61
Vested	(5.7		)	4.88		(1.0		)	4.62		(1.0		)	8.50
Forfeited	(0.6		)	8.16		(0.2		)	6.54		(0.1		)	11.62
Non-vested as of December 31, 2012	3.8			9.55		0.5			8.62		2.7			11.57
Total unrecognized compensation expense remaining	$	6.6				$	0.8				$	11.9
Weighted-average years expected to be recognized over	0.8					0.4					1.8

During 2012, 2011 and 2010, additional performance cash awards with a total target value of $33.6, $31.9 and $19.0 respectively, were awarded under the 2009 PIP and will be settled in shares upon vesting, which is three years from the grant date. As of December 31, 2012, there was $26.8 of total unrecognized compensation expense related to these awards, which is expected to be recognized over a remaining weighted-average period of 1.7 years.

In conjunction with our annual grant of long-term incentive compensation awards, we reviewed our estimates and assumptions in 2012, which resulted in an increase to our estimated forfeiture rate, as our review of our actual forfeitures indicated a higher level of forfeitures than previously assumed.

2009 Restricted Cash Plan

In March 2009, the Compensation Committee approved the Interpublic Restricted Cash Plan (the “Cash Plan”). Under the Cash Plan, the Board, the Compensation Committee or the Plan Administrator may grant cash awards to certain employees eligible to receive stock-settled and cash-settled awards. Cash awards, when granted, have a service period vesting condition and generally vest in three years.

Cash Awards

During the years ended December 31, 2012, 2011 and 2010, the Compensation Committee granted cash awards under the Cash Plan with a total target value of $2.7, $4.2 and $31.6, respectively, and we recognized $10.9, $16.6 and $12.8, respectively, in salaries and related expenses in our Consolidated Statements of Operations.

During the years ended December 31, 2012, 2011 and 2010, the Compensation Committee granted performance awards to be settled in cash under the 2009 PIP with a total target value of $37.4, $39.3, and $18.5, respectively, and we recognized $18.9, $22.0 and $11.4, respectively, in salaries and related expenses in our Consolidated Statements of Operations.

We amortize the present value of the amount expected to vest for cash awards and performance cash awards over the vesting period using the straight-line method, less an assumed forfeiture rate. Cash awards do not fall within the scope of the authoritative guidance for stock compensation as they are not paid in equity and the value of the award is not correlated with our stock price. Due to the cash nature of the payouts and the vesting period, we account for these awards in accordance with authoritative guidance for deferred compensation arrangements.

Employee Stock Purchase Plans

The Interpublic Group of Companies Employee Stock Purchase Plan (the “ESPP Plan”) became active April 1, 2007. Under the ESPP Plan, eligible employees may purchase our common stock through payroll deductions not exceeding 10% of their eligible compensation or 900 (actual number) shares each offering period. The price an employee pays for a share of common stock under the ESPP Plan is 90% of the lesser of the average market price of a share on the first business day of the offering period or the average market price of a share on the last business day of the offering period of three months. An aggregate of 15.0 shares are reserved for issuance under the ESPP Plan, of which 2.3 shares have been issued through December 31, 2012.

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

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-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

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-Number 93-6

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Fair Value Measurements (Notes)

12 Months Ended

Dec. 31, 2012

Fair Value Disclosures [Abstract]

Fair Value Disclosures

Fair Value Measurements

Authoritative guidance for fair value measurements establishes a fair value hierarchy which requires us to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. There are three levels of inputs that may be used to measure fair value:



Level 1		Unadjusted quoted prices in active markets for identical assets or liabilities. An active market for the asset or liability is a market in which transactions for the asset or liability occur with sufficient frequency and volume to provide pricing information on an ongoing basis.

Level 2		Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

Level 3		Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

Financial Instruments that are Measured at Fair Value on a Recurring Basis

We primarily apply the market approach to determine the fair value of financial instruments that are measured at fair value on a recurring basis. There were no changes to our valuation techniques used to determine the fair value of financial instruments during 2012 as compared to the prior year.

The following tables present information about our financial instruments measured at fair value on a recurring basis as of December 31, 2012 and December 31, 2011, and indicates the fair value hierarchy of the valuation techniques utilized to determine such fair value.



	December 31, 2012												Balance Sheet Classification
	Level 1			Level 2			Level 3			Total			Balance Sheet Classification
Assets
Cash equivalents	$	1,806.6		$	0.0		$	0.0		$	1,806.6		Cash and cash equivalents
Short-term marketable securities	16.0			0.0			0.0			16.0			Marketable securities
Long-term investments	1.5			0.0			0.0			1.5			Other assets
Total	$	1,824.1		$	0.0		$	0.0		$	1,824.1

As a percentage of total assets	13.5		%	0.0		%	0.0		%	13.5		%

Liabilities
Mandatorily redeemable noncontrolling interests ¹	$	0.0		$	0.0		$	25.3		$	25.3

	December 31, 2011												Balance Sheet Classification
	Level 1			Level 2			Level 3			Total			Balance Sheet Classification
Assets
Cash equivalents	$	1,596.5		$	0.0		$	0.0		$	1,596.5		Cash and cash equivalents
Short-term marketable securities	12.9			0.0			0.0			12.9			Marketable securities
Long-term investments	1.3			9.0			0.0			10.3			Other assets
Total	$	1,610.7		$	9.0		$	0.0		$	1,619.7

As a percentage of total assets	12.5		%	0.1		%	0.0		%	12.5		%

Liabilities
Mandatorily redeemable noncontrolling interests ¹	$	0.0		$	0.0		$	58.9		$	58.9

Relates to unconditional obligations to purchase additional noncontrolling equity shares of consolidated subsidiaries. Fair value measurement of the obligation was based upon the amount payable as if the forward contracts were settled. The amount redeemable within the next twelve months is classified in accrued liabilities; any interests redeemable thereafter are classified in other non-current liabilities.

The following tables present additional information about financial instruments measured at fair value on a recurring basis and for which we utilize Level 3 inputs to determine fair value.



	Years ended December 31,
Liabilities	2012			2011
Mandatorily redeemable noncontrolling interests - Balance at beginning of period	$	58.9		$	52.0
Level 3 additions	0.0			28.1
Level 3 reductions	(34.9		)	(28.0		)
Realized losses included in net income	(1.4		)	(6.7		)
Foreign currency translation	(0.1		)	0.1
Mandatorily redeemable noncontrolling interests - Balance at end of period	$	25.3		$	58.9

Level 3 reductions primarily consist of cash payments made related to unconditional obligations to purchase additional equity interests in previous acquisitions, which are classified within the financing section of our Consolidated Statements of Cash Flows. Level 3 additions relate to new unconditional obligations to purchase additional equity interests in previous acquisitions for cash in future periods. Realized losses included in net income for mandatorily redeemable noncontrolling interests are reported as a component of interest expense in our Consolidated Statements of Operations.

Gross unrealized and realized gains and losses for our long-term investments and short-term marketable securities were not material for the years ended December 31, 2012, 2011 and 2010.

Financial Instruments that are not Measured at Fair Value on a Recurring Basis

The following table presents information about our financial instruments that are not measured at fair value on a recurring basis as of December 31, 2012, and indicates the fair value hierarchy of the valuation techniques utilized to determine such fair value.



	December 31, 2012
	Level 1		Level 2		Level 3		Total
Total long-term debt	$	0.0	$	2,292.4	$	90.8	$	2,383.2

Our long-term debt comprises senior notes and other notes payable. The fair value of our senior notes traded over-the-counter is based on quoted prices for such securities, but which fair value can also be derived from inputs that are readily observable. Therefore, these senior notes are classified as Level 2 within the fair value hierarchy. Our other notes payable are not actively traded and their fair value is not solely derived from readily observable inputs. Thus, the fair value of our other notes payable is determined based on a discounted cash flow model and other proprietary valuation methods, and therefore is classified as Level 3 within the fair value hierarchy. See Note 2 for further information on our long-term debt.

Non-financial Instruments that are Measured at Fair Value on a Nonrecurring Basis

Certain non-financial instruments are measured at fair value on a nonrecurring basis, primarily goodwill, intangible assets, and property, plant and equipment. Accordingly, these assets are not measured and adjusted to fair value on an ongoing basis but are subject to periodic evaluations for potential impairment.

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]

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+ Details

Employee Benefits (Notes)

12 Months Ended

Dec. 31, 2012

Employee Benefits

Pension and Postretirement Benefit Plans

We have a defined benefit pension plan (the “Domestic Pension Plan”) that consists of approximately 4,100 participants and has been closed to new participants. We also have numerous funded and unfunded plans outside the U.S. The Interpublic Limited Pension Plan in the U.K. is a defined benefit plan and is our most material foreign pension plan in terms of the benefit obligation and plan assets. Some of our domestic and foreign subsidiaries provide postretirement health benefits and life insurance to eligible employees and, in certain cases, their dependents. The domestic postretirement benefit plan is our most material postretirement benefit plan in terms of the benefit obligation. This plan consists of approximately 2,400 participants, is closed to new participants and is unfunded.

Differences between the aggregate income statement and balance sheet amounts listed in the tables below and the totals reported in our Consolidated Statements of Operations, Consolidated Statements of Comprehensive Income and Consolidated Balance Sheets relate to non-material foreign pension and postretirement benefit plans.

Pension and Postretirement Benefit Obligation

The change in the benefit obligation, the change in plan assets, the funded status and amounts recognized for the domestic pension plan, the significant foreign pension plans and the domestic postretirement benefit plan are listed below.



	Domestic Pension Plan						Foreign Pension Plans						Domestic Postretirement Benefit Plan
	Domestic Pension Plan						Foreign Pension Plans						Domestic Postretirement Benefit Plan
December 31,	2012			2011			2012			2011			2012			2011
Benefit Obligation
Projected benefit obligation as of January 1	$	129.0		$	130.9		$	456.6		$	431.1		$	50.8		$	51.8
Service cost	0.0			0.0			10.2			9.6			0.2			0.2
Interest cost	6.3			6.8			21.9			23.3			2.3			2.7
Benefits paid	(10.8		)	(11.9		)	(20.4		)	(21.2		)	(5.9		)	(6.2		)
Plan participant contributions	0.0			0.0			0.6			0.7			1.7			1.4
Actuarial losses (gains)	16.1			3.2			60.0			13.5			(2.5		)	0.9
Settlements and curtailments	0.0			0.0			(6.5		)	(5.8		)	0.0			0.0
Foreign currency effect	0.0			0.0			8.9			4.9			0.0			0.0
Other	0.0			0.0			1.1			0.5			0.0			0.0

Projected benefit obligation as of December 31	$	140.6		$	129.0		$	532.4		$	456.6		$	46.6		$	50.8

Fair Value of Plan Assets
Fair value of plan assets as of January 1	$	107.2		$	95.3		$	363.6		$	312.1		$	0.0		$	0.0
Actual return on plan assets	13.7			9.7			17.6			9.0			0.0			0.0
Employer contributions	5.6			14.1			17.7			65.0			4.2			4.8
Plan participant contributions	0.0			0.0			0.6			0.7			1.7			1.4
Benefits paid	(10.8		)	(11.9		)	(20.4		)	(21.2		)	(5.9		)	(6.2		)
Settlements	0.0			0.0			(6.1		)	(5.8		)	0.0			0.0
Foreign currency effect	0.0			0.0			8.7			3.8			0.0			0.0
																0.0
Fair value of plan assets as of December 31	$	115.7		$	107.2		$	381.7		$	363.6		$	0.0		$	0.0

Funded status of the plans at December 31	$	(24.9	)	$	(21.8	)	$	(150.7	)	$	(93.0	)	$	(46.6	)	$	(50.8	)



	Domestic Pension Plan						Foreign Pension Plans						Domestic Postretirement Benefit Plan
December 31,	2012			2011			2012			2011			2012			2011
Amounts recognized in Consolidated Balance Sheets
Non-current asset	$	0.0		$	0.0		$	7.4		$	19.6		$	0.0		$	0.0
Current liability	0.0			0.0			(8.4		)	(8.1		)	(4.6		)	(4.9		)
Non-current liability	(24.9		)	(21.8		)	(149.7		)	(104.5		)	(42.0		)	(45.9		)

Net liability recognized	$	(24.9	)	$	(21.8	)	$	(150.7	)	$	(93.0	)	$	(46.6	)	$	(50.8	)

Accumulated benefit obligation	$	140.6		$	129.0		$	508.5		$	432.8

Amounts recognized in Accumulated Other Comprehensive Loss, net
Net actuarial loss	$	53.6		$	49.9		$	115.7		$	55.2		$	4.2		$	6.7
Prior service cost (credit)	0.0			0.0			1.8			1.9			(0.2		)	(0.3		)
Transition obligation	0.0			0.0			0.0			0.0			0.0			0.1

Total amount recognized	$	53.6		$	49.9		$	117.5		$	57.1		$	4.0		$	6.5

In 2013, we estimate that we will recognize $8.3 and $2.9 of net actuarial losses from accumulated other comprehensive loss, net to net periodic cost related to our domestic pension plan and significant foreign pension plans, respectively.



	Domestic Pension Plan				Foreign Pension Plans
December 31,	2012		2011		2012		2011
Pension plans with underfunded or unfunded accumulated benefit obligation
Aggregate projected benefit obligation	$	140.6	$	129.0	$	515.8	$	132.6
Aggregate accumulated benefit obligation	140.6		129.0		497.3		127.0
Aggregate fair value of plan assets	115.7		107.2		358.5		20.2

Net Periodic Cost

The components of net periodic benefit cost and key assumptions are listed below.



	Domestic Pension Plan									Foreign Pension Plans									Domestic Postretirement Benefit Plan
Years ended December 31,	2012			2011			2010			2012			2011			2010			2012			2011			2010
Service cost	$	0.0		$	0.0		$	0.0		$	10.2		$	9.6		$	9.7		$	0.2		$	0.2		$	0.3
Interest cost	6.3			6.8			7.3			21.9			23.3			22.8			2.3			2.7			2.8
Expected return on plan assets	(7.7		)	(7.5		)	(7.0		)	(18.2		)	(19.0		)	(17.0		)	0.0			0.0			0.0
Settlement and curtailment losses	0.0			0.0			0.0			0.7			0.0			1.4			0.0			0.0			0.0
Amortization of:
Transition obligation	0.0			0.0			0.0			0.0			0.0			0.0			0.2			0.1			0.2
Prior service cost (credit)	0.0			0.0			0.0			0.2			0.2			0.2			(0.1		)	(0.1		)	(0.1		)
Unrecognized actuarial losses	6.4			6.6			8.6			1.0			0.7			1.9			0.0			0.0			0.0
Net periodic cost	$	5.0		$	5.9		$	8.9		$	15.8		$	14.8		$	19.0		$	2.6		$	2.9		$	3.2

Assumptions



	Domestic Pension Plan						Foreign Pension Plans						Domestic Postretirement Benefit Plan
Years ended December 31,	2012		2011		2010		2012		2011		2010		2012		2011		2010
Net periodic cost
Discount rate	5.00	%	5.50	%	5.51	%	5.00	%	5.45	%	5.50	%	5.00	%	5.50	%	5.50	%
Rate of compensation increase	N/A		N/A		N/A		3.66	%	4.37	%	4.43	%	N/A		N/A		N/A
Expected return on plan assets	7.25	%	7.50	%	7.49	%	5.02	%	5.88	%	5.84	%	N/A		N/A		N/A
Benefit obligation
Discount rate	4.00	%	5.00	%	5.50	%	4.32	%	5.00	%	5.45	%	4.00	%	5.00	%	5.50	%
Rate of compensation increase	N/A		N/A		N/A		3.57	%	3.66	%	4.34	%	N/A		N/A		N/A
Health care cost trend rate assumed for next year
Initial rate (weighted-average)													8.00	%	8.00	%	8.50	%
Year ultimate rate is reached													2019		2016		2017
Ultimate rate													5.00	%	5.50	%	5.50	%

Discount Rates – At December 31, 2012, 2011 and 2010, we determined our discount rates for our domestic pension plan, foreign pension plans and domestic postretirement benefit plan based on either a bond selection/settlement approach or bond yield curve approach. Using the bond selection/settlement approach, we determine the discount rate by selecting a portfolio of corporate bonds appropriate to provide for the projected benefit payments. Using the bond yield curve approach, we determine the discount rate by matching the plans' cash flows to spot rates developed from a yield curve. Both approaches utilize high quality AA-rated corporate bonds and the plans' projected cash flows to develop a discounted value of the benefit payments, which is then used to develop a single discount rate. In countries where markets for high-quality long-term AA corporate bonds are not well developed, a portfolio of long-term government bonds is used as a basis to develop hypothetical corporate bond yields, which serve as a basis to derive the discount rate.

Expected Return on Assets – Our expected rate of return is determined at the beginning of each year and considers asset class index returns over various market and economic conditions, current and expected market conditions, risk premiums associated with asset classes and long-term inflation rates. We determine both a short-term and long-term view and then select a long-term rate of return assumption that matches the duration of our liabilities.

Fair Value of Pension Plan Assets

The following table presents the fair value of our domestic and foreign pension plans' assets as of December 31, 2012 and 2011, and indicates the fair value hierarchy of the valuation techniques utilized to determine such fair value. See Note 11 for a description of the fair value hierarchy.



	December 31, 2012								December 31, 2011
Asset Class	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Investment funds	$	22.3	$	327.9	$	48.2	$	398.4	$	18.4	$	307.1	$	43.8	$	369.3
Insurance contracts	0.0		24.8		0.0		24.8		0.0		24.8		0.0		24.8
Limited partnerships	0.0		0.0		39.8		39.8		0.0		0.0		41.1		41.1
Other	28.6		5.5		0.3		34.4		31.1		4.4		0.1		35.6
Total	$	50.9	$	358.2	$	88.3	$	497.4	$	49.5	$	336.3	$	85.0	$	470.8

Investment funds include mutual funds, common/collective trusts, hedge funds and other commingled assets that are invested primarily in equity and fixed income securities. Mutual funds, which are publicly traded, are primarily valued using recently reported sales prices. Investment funds, which are not publicly traded, are valued based on the net asset value of shares held by the plan at year end, which reflects the fair value of the underlying investments. Insurance contracts are valued based on the cash surrender value of the contract. Limited partnerships are invested primarily in equity and fixed income securities. Other investments primarily include cash and cash equivalents, equity securities, derivatives and fixed income securities such as government and investment-grade corporate bonds.

The following table presents additional information about our domestic and foreign pension plans' assets for which we utilize Level 3 inputs to determine fair value.



	Year ended December 31, 2012									Year ended December 31, 2011
	Investment Funds		Limited Partnerships			Other		Total		Investment Funds			Limited Partnerships			Other		Total
Balance at beginning of period	$	43.8	$	41.1		$	0.1	$	85.0	$	53.9		$	3.2		$	0.1	$	57.2
Actual return on assets:
Assets sold during the year	0.0		0.0			0.0		0.0		0.1			0.0			0.0		0.1
Assets still held at year end	2.2		(1.3		)	0.0		0.9		(0.6		)	(1.2		)	0.0		(1.8		)
Net purchases, sales and settlements	2.2		0.0			0.2		2.4		(9.6		)	39.1			0.0		29.5
Balance at end of period	$	48.2	$	39.8		$	0.3	$	88.3	$	43.8		$	41.1		$	0.1	$	85.0

Asset Allocation

The primary investment goal for our plans’ assets is to maximize total asset returns while ensuring the plans’ assets are available to fund the plans’ liabilities as they become due. The plans’ assets in aggregate and at the individual portfolio level are invested so that total portfolio risk exposure and risk-adjusted returns best achieve this objective. The aggregate amount of our own stock held as investment for our domestic and foreign pension funds is considered negligible relative to the total fund assets. As of December 31, 2012, the weighted-average target and actual asset allocations relating to our domestic and foreign pension plans' assets are listed below.



			December 31,
Asset Class	2013 Target Allocation		2012		2011
Equity securities	23	%	22	%	20	%
Fixed income securities	48	%	44	%	47	%
Real estate	5	%	5	%	1	%
Other	24	%	29	%	32	%
Total	100	%	100	%	100	%

Cash Flows

During 2012, we contributed $5.6 and $17.7 of cash to our domestic and foreign pension plans, respectively. For 2013, we expect to contribute approximately $1.0 and $19.0 of cash to our domestic and foreign pension plans, respectively.

The following estimated future benefit payments, which reflect future service, as appropriate, are expected to be paid in the years indicated below.



Years	Domestic Pension Plan		Foreign Pension Plans		Domestic Postretirement Benefit Plan
2013	$	10.1	$	22.0	$	5.0
2014	9.8		23.0		4.8
2015	9.6		23.2		4.7
2016	9.3		26.0		4.4
2017	9.1		25.9		4.2
2018 - 2022	42.8		143.5		17.5

The estimated future payments for our domestic postretirement benefit plan is before any estimated federal subsidies expected to be received under the Medicare Prescription Drug, Improvement and Modernization Act of 2003.

The following federal subsidies are expected to be received in the years indicated below.



Years	Domestic Postretirement Benefit Plan
2013	$	0.4
2014	0.5
2015	0.5
2016	0.5
2017	0.5
2018 - 2022	0.9

Savings Plans

We sponsor defined contribution plans (the “Savings Plans”) that cover substantially all domestic employees. The Savings Plans permit participants to make contributions on a pre-tax and/or after-tax basis and allow participants to choose among various investment alternatives. We match a portion of participant contributions based upon their years of service. Amounts expensed for the Savings Plans for 2012, 2011 and 2010 were $35.6, $35.4 and $34.3, respectively. Expense includes a discretionary Company contribution of $4.8, $3.7 and $3.6 offset by participant forfeitures of $3.0, $2.6 and $2.4 in 2012, 2011 and 2010, respectively. In addition, we maintain defined contribution plans in various foreign countries and contributed $34.0, $30.8 and $26.2 to these plans in 2012, 2011 and 2010, respectively.

Deferred Compensation and Benefit Arrangements

We have deferred compensation arrangements which (i) permit certain of our key officers and employees to defer a portion of their salary or incentive compensation, or (ii) require us to contribute an amount to the participant’s account. The arrangements typically provide that the participant will receive the amounts deferred plus interest upon attaining certain conditions, such as completing a certain number of years of service or upon retirement or termination. As of December 31, 2012 and 2011, the deferred compensation liability balance was $90.0 and $96.0, respectively. Amounts expensed for deferred compensation arrangements in 2012, 2011 and 2010 were $9.8, $7.6 and $14.1, respectively.

We have deferred benefit arrangements with certain key officers and employees that provide participants with an annual payment, payable when the participant attains a certain age and after the participant’s employment has terminated. The deferred benefit liability was $173.8 and $178.3 as of December 31, 2012 and 2011, respectively. Amounts expensed for deferred benefit arrangements in 2012, 2011 and 2010 were $15.0, $14.8 and $12.9, respectively.

We have purchased life insurance policies on participants’ lives to assist in the funding of the related deferred compensation and deferred benefit liabilities. As of December 31, 2012 and 2011, the cash surrender value of these policies was $150.2 and $144.9, respectively. In addition to the life insurance policies, certain investments are held for the purpose of paying the deferred compensation and deferred benefit liabilities. These investments, along with the life insurance policies, are held in a separate revocable trust for the purpose of paying the deferred compensation and the deferred benefit arrangement liabilities. As of December 31, 2012 and 2011, the value of such investments in the trust was $5.9 and $13.8, respectively. The short-term investments are included in cash and cash equivalents, and the long-term investments and cash surrender value of the policies are included in other assets.

Long-Term Disability Plan

We have a long-term disability plan which provides income replacement benefits to eligible participants who are unable to perform their job duties during the first 24 months of disability. Income replacement benefits are continued thereafter if the participant is unable to perform any job related to his or her education, training or experience. As all income replacement benefits are fully insured, no related obligation is required as of December 31, 2012 and 2011. In addition to income replacement benefits, plan participants may remain covered for certain health and life insurance benefits up to age 65, and accordingly, we have recorded an obligation of $11.3 and $9.3 as of December 31, 2012 and 2011, respectively.

The entire disclosure for pension and other postretirement benefits.

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-Publisher FASB

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-Number 30

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+ Details

Segment Information (Notes)

12 Months Ended

Dec. 31, 2012

Segment Reporting [Abstract]

Segment Information

As of December 31, 2012, we have two reportable segments, which are IAN and CMG. IAN is comprised of McCann Worldgroup, Draftfcb, Lowe & Partners, Mediabrands and our domestic integrated agencies. CMG is comprised of a number of our specialist marketing services offerings. We also report results for the “Corporate and other” group.

Within IAN, our agencies provide a comprehensive array of global communications and marketing services, each offering a distinctive range of solutions for our clients. In addition, our domestic integrated agencies, including Campbell-Ewald, Hill Holliday and Mullen, provide a full range of advertising, marketing communications services and/or marketing services and partner with our global operating divisions as needed. IAN’s operating divisions share similar economic characteristics and are similar in other areas, specifically related to the nature of their services, the manner in which the services are provided and the similarity of their respective customers.

CMG, which includes Weber Shandwick, FutureBrand, DeVries, GolinHarris, Jack Morton, and Octagon Worldwide, provides clients with diversified services, including public relations, meeting and event production, sports and entertainment marketing, corporate and brand identity and strategic marketing consulting. CMG shares some similarities with service lines offered by IAN; however, on an aggregate basis, CMG has a higher proportion of arrangements for which they act as principal, a different distribution model than IAN and different margin structure.

The profitability measure employed by our chief operating decision maker for allocating resources to operating divisions and assessing operating division performance is operating income. All segments follow the same accounting policies as those described in Note 1.

Certain corporate and other charges are reported as a separate line item within total segment operating income and include corporate office expenses, shared service center expenses and certain other centrally managed expenses that are not fully allocated to operating divisions. Salaries and related expenses include salaries, long-term incentive awards, annual bonuses and other miscellaneous benefits for corporate office employees. Office and general expenses primarily include professional fees related to internal control compliance, financial statement audits and legal, information technology and other consulting services, which are engaged and managed through the corporate office. In addition, office and general expenses includes rental expense and depreciation of leasehold improvements for properties occupied by corporate office employees. A portion of centrally managed expenses are allocated to operating divisions based on a formula that uses the planned revenues of each of the operating units. Amounts allocated also include specific charges for information technology-related projects, which are allocated based on utilization.

Summarized financial information concerning our reportable segments is shown in the following table.



	Years ended December 31,
	2012			2011			2010
Revenue:
IAN	$	5,728.5		$	5,891.8		$	5,468.4
CMG	1,227.7			1,122.8			1,038.9
Total	$	6,956.2		$	7,014.6		$	6,507.3

Segment operating income:
IAN	$	701.1		$	728.0		$	615.2
CMG	114.5			101.2			78.8
Corporate and other	(137.3		)	(142.0		)	(145.3		)
Total	678.3			687.2			548.7

Interest expense	(133.5		)	(136.8		)	(139.7		)
Interest income	29.5			37.8			28.7
Other income, net	100.5			150.2			12.9
Income before income taxes	$	674.8		$	738.4		$	450.6

Depreciation and amortization of fixed assets and intangible assets:
IAN	$	119.7		$	125.7		$	116.7
CMG	14.4			12.8			14.2
Corporate and other	13.6			12.4			17.5
Total	$	147.7		$	150.9		$	148.4

Capital expenditures:
IAN	$	97.5		$	94.1		$	83.5
CMG	26.7			16.9			6.9
Corporate and other	45.0			29.3			5.9
Total	$	169.2		$	140.3		$	96.3

	December 31,
	2012			2011
Total assets:
IAN	$	11,035.3		$	10,589.2
CMG	1,073.1			1,019.9
Corporate and other	1,385.5			1,299.6
Total	$	13,493.9		$	12,908.7

Revenue and long-lived assets, excluding intangible assets, are presented by major geographic area in the following table.



	Revenue						Long-Lived Assets
	Years ended December 31,						December 31,
	2012		2011		2010		2012		2011
Domestic	$	3,803.6	$	3,887.7	$	3,709.9	$	502.5	$	477.2
International:
United Kingdom	572.0		539.4		469.6		64.3		65.2
Continental Europe	823.1		908.9		863.2		76.0		72.1
Asia Pacific	838.1		741.7		639.8		88.0		78.4
Latin America	450.1		444.4		363.3		70.5		69.1
Other	469.3		492.5		461.5		38.8		34.5
Total international	3,152.6		3,126.9		2,797.4		337.6		319.3
Total consolidated	$	6,956.2	$	7,014.6	$	6,507.3	$	840.1	$	796.5

Revenue is primarily attributed to geographic areas based on where the services are performed. Furniture, equipment and leasehold improvements are allocated based upon physical location. Other assets and investments are allocated based on the location of the related operations.

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

Commitments and Contingencies Disclosure [Abstract]

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+ Details

Commitments and Contingencies (Notes)

12 Months Ended

Dec. 31, 2012

Commitments and Contingencies

Leases

We lease office premises and equipment. Where leases contain escalation clauses or concessions, such as rent holidays and landlord/tenant incentives or allowances, the impact of such adjustments is recognized on a straight-line basis over the minimum lease period. Certain leases provide for renewal options and require the payment of real estate taxes or other occupancy costs, which are also subject to escalation clauses. Net rent expense is listed in the table below.



	Years ended December 31,
	2012			2011			2010
Gross rent expense	$	358.5		$	369.5		$	365.2
Third-party sublease rental income	(17.5		)	(19.4		)	(20.0		)
Net rent expense	$	341.0		$	350.1		$	345.2

Cash amounts for future minimum lease commitments for office premises and equipment under non-cancelable leases, along with minimum sublease rental income to be received under non-cancelable subleases, are listed in the table below.



Period	Rent Obligations		Sublease Rental Income			Net Rent
2013	$	309.1	$	(26.9	)	$	282.2
2014	275.8		(14.7		)	261.1
2015	243.4		(7.3		)	236.1
2016	200.3		(2.1		)	198.2
2017	164.2		(0.6		)	163.6
Thereafter	675.8		(0.3		)	675.5
Total	$	1,868.6	$	(51.9	)	$	1,816.7

Guarantees

We have guaranteed certain obligations of our subsidiaries relating principally to operating leases and credit facilities of certain subsidiaries. The amount of parent company guarantees on lease obligations was $410.3 and $385.1 as of December 31, 2012 and 2011, respectively, and the amount of parent company guarantees primarily relating to credit facilities was $283.4 and $327.5 as of December 31, 2012 and 2011, respectively. In the event of non-payment by the applicable subsidiary of the obligations covered by a guarantee, we would be obligated to pay the amounts covered by that guarantee. As of December 31, 2012, there were no material assets pledged as security for such parent company guarantees.

Contingent Acquisition Obligations

The following table details the estimated future contingent acquisition obligations payable in cash as of December 31, 2012.



	2013			2014			2015			2016			2017		Thereafter		Total
Deferred acquisition payments	$	26.0		$	12.4		$	9.7		$	46.4		$	18.9	$	2.0	$	115.4
Redeemable noncontrolling interests and call options with affiliates ¹	20.5			43.8			32.9			5.7			2.2		10.6		115.7
Total contingent acquisition payments	46.5			56.2			42.6			52.1			21.1		12.6		231.1
Less: cash compensation expense included above	(0.7		)	(0.6		)	(0.8		)	(0.2		)	0.0		0.0		(2.3		)
Total	$	45.8		$	55.6		$	41.8		$	51.9		$	21.1	$	12.6	$	228.8

We have entered into certain acquisitions that contain both redeemable noncontrolling interests and call options with similar terms and conditions. We have certain redeemable noncontrolling interests that are exercisable at the discretion of the noncontrolling equity owners as of December 31, 2012. These estimated payments of $16.4 are included within the total payments expected to be made in 2013, and will continue to be carried forward into 2014 or beyond until exercised or expired. Redeemable noncontrolling interests are included in the table at current exercise price payable in cash, not at applicable redemption value in accordance with the authoritative guidance for classification and measurement of redeemable securities.

The estimated amounts listed would be paid in the event of exercise at the earliest exercise date. See Note 6 for further information relating to the payment structure of our acquisitions. All payments are contingent upon achieving projected operating performance targets and satisfying other conditions specified in the related agreements and are subject to revisions as the earn-out periods progress.

Legal Matters

We are involved in various legal proceedings, and subject to investigations, inspections, audits, inquiries and similar actions by governmental authorities, arising in the normal course of business. We evaluate all cases each reporting period and record liabilities for losses from legal proceedings when we determine that it is probable that the outcome in a legal proceeding will be unfavorable and the amount, or potential range, of loss can be reasonably estimated. In certain cases, we cannot reasonably estimate the potential loss because, for example, the litigation is in its early stages. While any outcome related to litigation or such governmental proceedings in which we are involved cannot be predicted with certainty, management believes that the outcome of these matters, individually and in the aggregate, will not have a material adverse effect on our financial condition, results of operations or cash flows.

The entire disclosure for commitments and contingencies.

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+ Details

Recent Accounting Standards (Notes)	12 Months Ended
Recent Accounting Standards (Notes)	Dec. 31, 2012
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Recent Accounting Standards	Recent Accounting Standards Impairment of Indefinite-Lived Intangible Assets In July 2012, the Financial Accounting Standards Board ("FASB") issued amended guidance to simplify impairment testing of indefinite-lived intangible assets other than goodwill. The amended guidance permits an entity to first assess qualitative factors to determine whether it is "more likely than not" that the indefinite-lived intangible asset is impaired. If, after assessing qualitative factors, an entity concludes that it is not "more likely than not" that the indefinite-lived intangible asset is impaired, then no additional testing is required. We adopted the amended guidance for our 2012 annual impairment test, which was performed as of October 1, 2012. The adoption of the amended guidance did not have a significant impact on our Consolidated Financial Statements. Comprehensive Income In June 2011, the FASB issued amended guidance for presenting comprehensive income, which was effective for us January 1, 2012, and applied retrospectively. The amended guidance provides the option to present the items of net income and other comprehensive income in a single continuous statement of comprehensive income or in two separate, but consecutive, statements, and eliminates the option to present other comprehensive income and its components in the statement of stockholders' equity. The adoption of this amended guidance did not have a significant impact on our Consolidated Financial Statements. Fair Value Measurements In May 2011, the FASB issued amended guidance for measuring fair value and required disclosure information about such measures, which was effective for us January 1, 2012, and applied prospectively. The amended guidance requires an entity to disclose all transfers between Level 1 and Level 2 of the fair value hierarchy, as well as provide quantitative and qualitative disclosures related to Level 3 fair value measurements. Additionally, the amended guidance requires an entity to disclose the fair value hierarchy level which was used to determine the fair value of financial instruments that are not measured at fair value, but for which fair value information must be disclosed. The adoption of this amended guidance did not have a significant impact on our Consolidated Financial Statements.

Tabular disclosure of changes in accounting principles, including adoption of new accounting pronouncements, that describes the new methods, amount and effects on financial statement line items.

Quarterly Financial Information Disclosure [Abstract]

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-URI http://asc.fasb.org/extlink&oid=6801783&loc=d3e22583-107794

Reference 13: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Retrospective Application

-URI http://asc.fasb.org/extlink&oid=6523989

Reference 14: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 154

-Paragraph 2, 17, 18

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Results by Quarter (Unaudited)

12 Months Ended

Dec. 31, 2012

Quarterly Financial Information

Results by Quarter (Unaudited)



	Three Months Ended March 31,						Three Months Ended June 30,						Three Months Ended September 30,					Three Months Ended December 31,
	2012			2011			2012			2011			2012			2011		2012		2011
Revenue	$	1,506.8		$	1,474.8		$	1,715.7		$	1,740.7		$	1,670.4		$	1,726.5	$	2,063.3	$	2,072.6
Salaries and related expenses	1,104.9			1,080.1			1,088.9			1,095.7			1,064.3			1,088.0		1,133.8		1,138.3
Office and general expenses	441.3			440.0			450.4			471.0			474.7			465.3		519.6		549.0
Operating (loss) income	(39.4		)	(45.3		)	176.4			174.0			131.4			173.2		409.9		385.3
Other (expense) income, net ¹	(1.3		)	(6.1		)	4.7			5.3			1.7			137.1		95.4		13.9
Total (expenses) and other income¹	(25.9		)	(29.7		)	(21.3		)	(18.1		)	(23.2		)	113.9		66.9		(14.9		)
(Benefit of) provision for income taxes	(19.2		)	(21.5		)	50.1			47.6			41.9			70.4		140.5		93.7
Net (loss) income ¹	(45.7		)	(53.2		)	105.5			108.9			67.7			217.5		337.1		278.3
Net (loss) income available to IPG common stockholders ¹	$	(45.9	)	$	(48.1	)	$	99.0		$	101.7		$	68.7		$	208.1	$	313.3	$	259.0
(Loss) earnings per share available to IPG common stockholders:
Basic	$	(0.10	)	$	(0.10	)	$	0.23		$	0.21		$	0.16		$	0.45	$	0.74	$	0.58
Diluted	$	(0.10	)	$	(0.10	)	$	0.22		$	0.19		$	0.15		$	0.40	$	0.68	$	0.50

Dividends declared per common stock	$	0.06		$	0.06		$	0.06		$	0.06		$	0.06		$	0.06	$	0.06	$	0.06


¹	The three months ended December 31, 2012 and the three months ended September 30, 2011, include a pre-tax gain of $93.6 and $132.2, respectively, related to the sale of our holdings in Facebook.

The entire disclosure for the quarterly financial data in the annual financial statements. The disclosure may include a tabular presentation of financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income or loss before extraordinary items and earnings per share data. It also includes an indication if the information in the note is unaudited, comments on the aggregate effect of year-end adjustments, and an explanation of matters or transactions that affect comparability or are pertinent to an understanding of the information furnished.

+ References+ Details

Subsequent Events	12 Months Ended
Subsequent Events	Dec. 31, 2012
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events In February 2013, we announced the exercise of the Company's option to redeem for cash all remaining 4.75% Notes outstanding on the redemption date, which will be March 15, 2013. Under the terms of the 4.75% Notes, as a result of the exercise of our redemption option, holders may elect to convert their 4.75% Notes into common stock at any time prior to the redemption date. The maximum aggregate redemption price will be the $200.0 in aggregate principal amount of our 4.75% Notes, plus accrued and unpaid interest up to, but excluding, the redemption date. See Note 2 for further information on the 4.75% Notes. Additionally, in February 2013, we announced that our Board had approved a new share repurchase program to repurchase from time to time up to $300.0, excluding fees, of our common stock (the "2013 share repurchase program"). The authorization for repurchases under the 2013 share repurchase program is in addition to any amounts remaining available for repurchase under the 2012 share repurchase program. See Note 5 for further information on the 2012 share repurchase program. We may effect such repurchases under the 2013 share repurchase program through open market purchases, trading plans established in accordance with SEC rules, derivative transactions or other means. The timing and amount of repurchases under the authorization will depend on market conditions and other funding requirements. There is no expiration date associated with the share repurchase programs. We also announced in February 2013, that our Board had declared a common stock cash dividend of $0.075 per share, payable on March 25, 2013 to holders of record as of the close of business on March 11, 2013.

Summary of Significant Accounting Policies Principles of Consolidation (Policies)	12 Months Ended
	Dec. 31, 2012
Accounting Policies [Abstract]
Principles of Consolidation	Principles of Consolidation The Consolidated Financial Statements include the accounts of the Company and its consolidated subsidiaries, some of which are not wholly owned. Investments in companies over which we do not have control, but the ability to exercise significant influence, are accounted for using the equity method of accounting. Investments in companies over which we have neither control nor have the ability to exercise significant influence are accounted for under the cost method. All intercompany accounts and transactions have been eliminated in consolidation. We have consolidated certain entities meeting the definition of variable interest entities, and the inclusion of these entities does not have a material impact on our Consolidated Financial Statements.

Disclosure of accounting policy regarding (1) the principles it follows in consolidating or combining the separate financial statements, including the principles followed in determining the inclusion or exclusion of subsidiaries or other entities in the consolidated or combined financial statements and (2) its treatment of interests (for example, common stock, a partnership interest or other means of exerting influence) in other entities, for example consolidation or use of the equity or cost methods of accounting. The accounting policy may also address the accounting treatment for intercompany accounts and transactions, noncontrolling interest, and the income statement treatment in consolidation for issuances of stock by a subsidiary.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 140

-Paragraph 46

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02, 03

-Article 3A

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Interpretation (FIN)

-Number 46R

-Paragraph 4

-Subparagraph c

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-Subparagraph d

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-Number 46R

-Paragraph 14, 15

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-Publisher FASB

-Name Emerging Issues Task Force (EITF)

-Number 97-2

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph k

-Article 1

Reference 8: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Principles Board Opinion (APB)

-Number 18

-Paragraph 5, 6, 16-19

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-Name Accounting Principles Board Opinion (APB)

-Number 18

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-Subparagraph a(2)

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-Number 96-16

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-Name Accounting Standards Codification

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-Name Accounting Standards Codification

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-URI http://asc.fasb.org/subtopic&trid=2197480

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-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=18733093&loc=d3e5614-111684

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-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.3A-02)

-URI http://asc.fasb.org/extlink&oid=6959686&loc=d3e355033-122828

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-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 51

-Paragraph 2-6

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 40

-Section 45

-URI http://asc.fasb.org/section&trid=2197723

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-URI http://asc.fasb.org/subtopic&trid=2196966

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 325

-SubTopic 20

-URI http://asc.fasb.org/subtopic&trid=2197087

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 45

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=16385135&loc=d3e33801-111570

+ Details

Summary of Significant Accounting Policies Use of Estimates (Policies)	12 Months Ended
	Dec. 31, 2012
Accounting Policies [Abstract]
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”) requires us to make judgments, assumptions and estimates that affect the amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the reporting date and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from these estimates and assumptions.

Disclosure of accounting policy for the use of estimates in the preparation of financial statements in conformity with generally accepted accounting principles.

+ References+ Details

Summary of Significant Accounting Policies Revenue Recognition (Policies)

12 Months Ended

Dec. 31, 2012

Accounting Policies [Abstract]

Revenue Recognition

•


•	Fees are recognized on a straight-line or monthly basis when service is provided essentially on a pro-rata basis and the terms of the contract support monthly basis accounting.

•

Disclosure of accounting policy for revenue recognition. If the entity has different policies for different types of revenue transactions, the policy for each material type of transaction is generally disclosed. If a sales transaction has multiple element arrangements (for example, delivery of multiple products, services or the rights to use assets) the disclosure may indicate the accounting policy for each unit of accounting as well as how units of accounting are determined and valued. The disclosure may encompass important judgment as to appropriateness of principles related to recognition of revenue. The disclosure also may indicate the entity's treatment of any unearned or deferred revenue that arises from the transaction.

+ References+ Details

Summary of Significant Accounting Policies Cash and Cash Equivalents (Policies)	12 Months Ended
	Dec. 31, 2012
Accounting Policies [Abstract]
Cash and Cash Equivalents	Cash and Cash Equivalents Cash equivalents are highly liquid investments, which include certificates of deposit, government securities, commercial paper and time deposits with original maturities of three months or less at the time of purchase and are stated at estimated fair value, which approximates cost. Cash is maintained at multiple high-credit-quality financial institutions.

Disclosure of accounting policy for cash and cash equivalents, including the policy for determining which items are treated as cash equivalents. Other information that may be disclosed includes (1) the nature of any restrictions on the entity's use of its cash and cash equivalents, (2) whether the entity's cash and cash equivalents are insured or expose the entity to credit risk, (3) the classification of any negative balance accounts (overdrafts), and (4) the carrying basis of cash equivalents (for example, at cost) and whether the carrying amount of cash equivalents approximates fair value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6367646&loc=d3e18780-107790

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Cash

-URI http://asc.fasb.org/extlink&oid=6506951

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Cash Equivalents

-URI http://asc.fasb.org/extlink&oid=6507016

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4273-108586

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 1

-Article 5

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 305

-SubTopic 10

-URI http://asc.fasb.org/subtopic&trid=2122427

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Financial Reporting Release (FRR)

-Number 203

-Paragraph 02-03

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Technical Practice Aid (TPA)

-Number 2110

-Paragraph 6

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 7, 8, 9, 10

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Summary of Significant Accounting Policies Short-Term Marketable Securities (Policies)	12 Months Ended
	Dec. 31, 2012
Accounting Policies [Abstract]
Short-Term Marketable Securities	Short-Term Marketable Securities Short-term marketable securities include investment-grade time deposits, commercial paper and government securities with maturities greater than three months but less than twelve months. These securities are classified as available-for-sale and are carried at fair value with net unrealized gains and losses reported as a component of accumulated other comprehensive loss, which is a component of stockholders’ equity. The cost of securities is determined based upon the average cost of the securities sold.

Disclosure of accounting policy for investments in debt and equity securities that have readily determinable fair values (marketable securities). At a minimum, the disclosure might address accounting policies for investments classified as trading, available for sale, or held to maturity and may include how the entity determines whether impairments of available for sale or held to maturity investments are other than temporary, how the fair values of the entity's securities are determined, and the entity's accounting treatment for transfers between investment categories.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6367646&loc=d3e18780-107790

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-URI http://asc.fasb.org/subtopic&trid=2196929

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 5

-Section M

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 2, 12

-Article 5

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

-Paragraph 7-16

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 107

-Paragraph 10, 11

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Staff Position (FSP)

-Number FAS115-1/124-1

-Paragraph 7, 8, 9, 13, 14, 15, 16, 17

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 320

-Section 50

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62652-112803

+ Details

Summary of Significant Accounting Policies Allowance for Doubtful Accounts (Policies)	12 Months Ended
	Dec. 31, 2012
Accounting Policies [Abstract]
Allowance for Doubtful Accounts	Allowance for Doubtful Accounts The allowance for doubtful accounts is estimated based on the aging of accounts receivable, reviews of client credit reports, industry trends and economic indicators, as well as reviews of recent payment history for specific customers. The estimate is based largely on a formula-driven calculation but is supplemented with economic indicators and knowledge of potential write-offs of specific client accounts.

Disclosure of accounting policy for trade and other accounts receivable, and finance, loan and lease receivables, including those classified as held for investment and held for sale. This disclosure may include (1) the basis at which such receivables are carried in the entity's statements of financial position (2) how the level of the valuation allowance for receivables is determined (3) when impairments, charge-offs or recoveries are recognized for such receivables (4) the treatment of origination fees and costs, including the amortization method for net deferred fees or costs (5) the treatment of any premiums or discounts or unearned income (6) the entity's income recognition policies for such receivables, including those that are impaired, past due or placed on nonaccrual status and (7) the treatment of foreclosures or repossessions (8) the nature and amount of any guarantees to repurchase receivables.

+ Details

Summary of Significant Accounting Policies Expenditures Billable to Clients (Policies)	12 Months Ended
	Dec. 31, 2012
Accounting Policies [Abstract]
Expenditures Billable to Clients	Expenditures Billable to Clients Expenditures billable to clients are primarily comprised of production and media costs that have been incurred but have not yet been billed to clients, as well as fees that have been earned which have not yet been billed to clients. Unbilled amounts are presented in expenditures billable to clients regardless of whether they relate to our fees or production and media costs. A provision is made for unrecoverable costs as deemed appropriate.

Disclosure of accounting policy for major classes of inventories, bases of stating inventories (for example, lower of cost or market), methods by which amounts are added and removed from inventory classes (for example, FIFO, LIFO, or average cost), loss recognition on impairment of inventories, and situations in which inventories are stated above cost. If inventory is carried at cost, this disclosure includes the nature of the cost elements included in inventory.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Financial Reporting Release (FRR)

-Number 206

-Paragraph b

-Subparagraph i, ii

-Chapter 2

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6367646&loc=d3e18780-107790

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 6

-Subparagraph a

-Article 5

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6361739&loc=d3e7789-107766

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-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 43

-Section A

-Paragraph 9

-Chapter 3

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.6(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 330

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6386783&loc=d3e4492-108314

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 330

-SubTopic 10

-URI http://asc.fasb.org/subtopic&trid=2126999

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 330

-SubTopic 10

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6386783&loc=d3e4556-108314

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-Publisher AICPA

-Name Statement of Position (SOP)

-Number 81-1

-Paragraph 69-75

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 43

-Paragraph 3, 5-10, 15, 16, 17

-Chapter 4

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Summary of Significant Accounting Policies Investments (Policies)	12 Months Ended
	Dec. 31, 2012
Accounting Policies [Abstract]
Investments	Investments Our investments in publicly traded companies over which we do not exert a significant influence are classified as available-for-sale. These investments are reported at fair value based on quoted market prices with net unrealized gains and losses reported as a component of accumulated other comprehensive loss. Our non-publicly traded investments and all other publicly traded investments, including investments to fund certain deferred compensation and retirement obligations, are accounted for using the equity method or cost method. We do not disclose the fair value for equity method investments or investments held at cost as it is not practical to estimate fair value since there is no readily available market data and it is cost prohibitive to obtain independent valuations. We regularly review our equity and cost method investments to determine whether a significant event or change in circumstances has occurred that may impact the fair value of each investment. In the event a decline in fair value of an investment occurs, we determine if the decline has been other-than-temporary. We consider our investments strategic and long-term in nature, so we determine if the fair value decline is recoverable within a reasonable period. For our investments, we evaluate fair value based on specific information (valuation methodologies, estimates of appraisals, financial statements, etc.) in addition to quoted market price, if available. We consider all known quantitative and qualitative factors in determining if an other-than-temporary decline in value of an investment has occurred.

Disclosure of accounting policy for investments in financial assets, including marketable securities (debt and equity securities with readily determinable fair values), investments accounted for under the equity method and cost method, securities borrowed and loaned, and repurchase and resale agreements. For marketable securities, the disclosure may include the entity's accounting treatment for transfers between investment categories and how the fair values for such securities are determined. Also, for all investments, an entity may describe its policy for assessing, recognizing and measuring impairment of the investment.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 107

-Paragraph 10, 11

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6367646&loc=d3e18780-107790

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 325

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6872867&loc=d3e40691-111596

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 10

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13433-108611

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)(2)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 6

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27290-111563

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 5

-Section M

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.2,12)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 9: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Staff Position (FSP)

-Number FAS115-1/124-1

-Paragraph 7-18

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 2, 12

-Article 5

Reference 11: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

-Paragraph 7-16

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Summary of Significant Accounting Policies Derivatives (Policies)	12 Months Ended
	Dec. 31, 2012
Accounting Policies [Abstract]
Derivatives	Derivatives We are exposed to market risk related to interest rates, foreign currency rates and certain balance sheet items. From time to time we enter into derivative instruments for risk management purposes, and not for speculative purposes. All derivative instruments are recorded at fair value on our balance sheet. Changes in fair value are immediately included in earnings if the derivatives are not designated as a hedge instrument or if the derivatives do not qualify as effective hedges. For derivatives designated as hedge instruments, we evaluate for hedge accounting both at inception and throughout the hedge period. If a derivative is designated as a fair value hedge, then changes in the fair value of the derivative are offset against the changes in the fair value of the underlying hedged item. If a derivative is designated as a cash flow hedge, then the effective portion of the changes in the fair value of the derivative is recognized as a component of accumulated other comprehensive income and subsequently reclassified to earnings in our Consolidated Statement of Operations in the same period as the underlying hedged transaction affects earnings.

Disclosure of accounting policy for its derivative instruments and hedging activities.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6367646&loc=d3e18780-107790

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=7476318&loc=d3e41620-113959

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 1A

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5579245-113959

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5579240-113959

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=7476318&loc=d3e41638-113959

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(n))

-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 44

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 7

-URI http://asc.fasb.org/extlink&oid=7476318&loc=d3e41675-113959

Reference 9: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Interpretation (FIN)

-Number 39

-Paragraph 10

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph n

-Article 4

+ Details

Summary of Significant Accounting Policies Furniture, Equipment and Leasehold Improvements (Policies)	12 Months Ended
	Dec. 31, 2012
Accounting Policies [Abstract]
Furniture, Equipment and Leasehold Improvements	Furniture, Equipment and Leasehold Improvements Furniture, equipment and leasehold improvements are stated at cost, net of accumulated depreciation. Furniture and equipment are depreciated generally using the straight-line method over the estimated useful lives of the related assets, which range from 3 to 7 years for furniture, equipment and computer software costs, 10 to 35 years for buildings and the shorter of the useful life or the remaining lease term for leasehold improvements.

Disclosure of accounting policy for property, plant and equipment which may include the basis of such assets, depreciation methods used and estimated useful lives, the entity's capitalization policy, including its accounting treatment for costs incurred for repairs and maintenance activities, whether such asset balances include capitalized interest and the method by which such is calculated, how disposals of such assets are accounted for and how impairment of such assets is assessed and recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6367646&loc=d3e18780-107790

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-URI http://asc.fasb.org/subtopic&trid=2155824

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 22

-Paragraph 12, 13

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 43

-Section C

-Paragraph 5

-Chapter 9

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 12

-Paragraph 5

-Subparagraph d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 144

-Paragraph 7

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.13(a))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 13

-Subparagraph a

-Article 5

Reference 9: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 34

-Paragraph 8, 9

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Summary of Significant Accounting Policies Goodwill and Other Intangible Assets (Policies)	12 Months Ended
	Dec. 31, 2012
Accounting Policies [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets We account for our business combinations using the acquisition accounting method, which requires us to determine the fair value of net assets acquired and the related goodwill and other intangible assets. Determining the fair value of assets acquired and liabilities assumed requires management's judgment and involves the use of significant estimates, including projections of future cash inflows and outflows, discount rates, asset lives and market multiples. Considering the characteristics of advertising, specialized marketing and communication services companies, our acquisitions usually do not have significant amounts of tangible assets, as the principal asset we typically acquire is creative talent. As a result, a substantial portion of the purchase price is allocated to goodwill and other intangible assets. We review goodwill and other intangible assets with indefinite lives not subject to amortization as of October 1^st each year and whenever events or significant changes in circumstances indicate that the carrying value may not be recoverable. We evaluate the recoverability of goodwill at a reporting unit level. We have 11 reporting units that were subject to the 2012 annual impairment testing. During 2012, our reporting unit structure changed due to the creation of a new reporting unit which had been previously included within an existing reporting unit, as well as the disposal of a reporting unit. Our annual impairment review as of October 1, 2012 did not result in an impairment charge at any of our reporting units. We review intangible assets with definite lives subject to amortization whenever events or circumstances indicate that a carrying amount of an asset may not be recoverable. Recoverability of these assets is determined by comparing the carrying value of these assets to the estimated undiscounted future cash flows expected to be generated by these assets. These assets are impaired when their carrying value exceeds their fair value. Impaired intangible assets with definite lives subject to amortization are written down to their fair value with a charge to expense in the period the impairment is identified. Intangible assets with definite lives are amortized on a straight-line basis with estimated useful lives generally between 7 and 15 years. Events or circumstances that might require impairment testing include the loss of a significant client, the identification of other impaired assets within a reporting unit, loss of key personnel, the disposition of a significant portion of a reporting unit, significant decline in stock price or a significant adverse change in business climate or regulations. In 2011, we adopted new authoritative guidance for goodwill which permits an entity to first assess qualitative factors to determine whether the fair value of a reporting unit is “more likely than not” less than its carrying value. Qualitative factors to consider may include macroeconomic conditions, industry and market considerations, cost factors that may have a negative effect on earnings, overall financial performance of the reporting unit, and other relevant entity-specific events such as changes in management, key personnel, strategy or clients, as well as pending litigation. If, after assessing the totality of events or circumstances such as those described above, an entity determines that it is "more likely than not" that the fair value of a reporting unit is less than its carrying value, then the entity is required to perform the first step of a two-step quantitative impairment test to identify and measure impairment, if necessary. Otherwise, no additional testing is required. For reporting units not included in the qualitative assessment, or for any reporting units identified in the qualitative assessment as "more likely than not" that the fair value is less than its carrying value, the first step of the quantitative impairment test is performed. For our annual impairment test, we compare the respective fair value of our reporting units' equity to the carrying value of their net assets. The first step is a comparison of the fair value of each reporting unit to its carrying value, including goodwill. The sum of the fair values of all our reporting units is reconciled to our current market capitalization plus an estimated control premium. Goodwill allocated to a reporting unit whose fair value is equal to or greater than its carrying value is not impaired, and no further testing is required. Should the carrying amount for a reporting unit exceed its fair value, then the first step of the quantitative impairment test is failed and the magnitude of any goodwill impairment is determined under the second step, which is a comparison of the implied fair value of a reporting unit's goodwill to its carrying value. The implied fair value of goodwill is the excess of the fair value of the reporting unit over its carrying value, excluding goodwill. Impaired goodwill is written down to its implied fair value with a charge to expense in the period the impairment is identified. The fair value of a reporting unit for 2012 and 2011 was estimated using a combination of the income approach, which incorporates the use of the discounted cash flow method, and the market approach, which incorporates the use of earnings and revenue multiples based on market data.

Disclosure of accounting policy for goodwill and intangible assets. This accounting policy also may address how an entity assesses and measures impairment of goodwill and intangible assets.

+ References+ Details

Summary of Significant Accounting Policies Foreign Currencies (Policies)	12 Months Ended
	Dec. 31, 2012
Accounting Policies [Abstract]
Foreign Currencies	Foreign Currencies The functional currency of our foreign operations is generally their respective local currency. Assets and liabilities are translated at the exchange rates in effect at the balance sheet date, and revenues and expenses are translated at the average exchange rates during the period presented. The resulting translation adjustments are recorded as a component of accumulated other comprehensive loss in the stockholders’ equity section of our Consolidated Balance Sheets. Currency transaction gains or losses primarily arising from transactions in currencies other than the functional currency are included in office and general expenses. Foreign currency transactions resulted in a pre-tax gain of $1.2 in 2012 and pre-tax losses of $0.9 in 2011 and $0.7 in 2010. We monitor the currencies of countries in which we operate in order to determine if the country should be considered a highly inflationary environment. A currency is determined to be highly inflationary when there is cumulative inflation of approximately 100% or more over a three-year period. If this occurs the functional currency of that country would be changed to our reporting currency, the U.S. Dollar, and foreign exchange gains or losses would be recognized on all monetary transactions, assets and liabilities in currencies other than the U.S. Dollar until the currency is no longer considered highly inflationary.

Disclosure of accounting policy for (1) transactions denominated in a currency other than the reporting enterprise's functional currency, (2) translating foreign currency financial statements that are incorporated into the financial statements of the reporting enterprise by consolidation, combination, or the equity method of accounting, and (3) remeasurement of the financial statements of a foreign reporting enterprise in a hyperinflationary economy.

+ References+ Details

Summary of Significant Accounting Policies Income Taxes (Policies)	12 Months Ended
	Dec. 31, 2012
Accounting Policies [Abstract]
Income Taxes	Income Taxes The provision for income taxes includes U.S. federal, state, local and foreign taxes. Income taxes are accounted for under the liability method. Deferred tax assets and liabilities are recognized for the estimated future tax consequences of temporary differences between the financial statement carrying amounts and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the year in which the temporary differences are expected to be reversed. We evaluate the realizability of our deferred tax assets and establish a valuation allowance when it is “more likely than not” that all or a portion of the deferred tax assets will not be realized. We evaluate our tax positions using the “more likely than not” recognition threshold and then apply a measurement assessment to those positions that meet the recognition threshold. We have established tax reserves that we believe to be adequate in relation to the potential for additional assessments in each of the jurisdictions in which we are subject to taxation. We regularly assess the likelihood of additional tax assessments in those jurisdictions and adjust our reserves as additional information or events require.

Disclosure of accounting policy for income taxes, which may include its accounting policies for recognizing and measuring deferred tax assets and liabilities and related valuation allowances, recognizing investment tax credits, operating loss carryforwards, tax credit carryforwards, and other carryforwards, methodologies for determining its effective income tax rate and the characterization of interest and penalties in the financial statements.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Interpretation (FIN)

-Number 48

-Paragraph 20

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6367646&loc=d3e18780-107790

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 45

-Paragraph 25

-URI http://asc.fasb.org/extlink&oid=21917399&loc=d3e32247-109318

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 19

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32840-109319

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 30

-URI http://asc.fasb.org/subtopic&trid=2144749

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 954

-SubTopic 740

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6491622&loc=d3e9504-115650

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-URI http://asc.fasb.org/subtopic&trid=2144681

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 17

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32809-109319

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 45

-Paragraph 28

-URI http://asc.fasb.org/extlink&oid=21917399&loc=d3e32280-109318

Reference 10: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 109

-Paragraph 6-34, 43, 47, 49

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 11: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 4

-Paragraph 11

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Summary of Significant Accounting Policies Redeemable Noncontrolling Interests (Policies)	12 Months Ended
	Dec. 31, 2012
Accounting Policies [Abstract]
Redeemable Noncontrolling Interests	Redeemable Noncontrolling Interests Many of our acquisitions include provisions under which the noncontrolling equity owners can require us to purchase additional interests in a subsidiary at their discretion. Payments for these redeemable noncontrolling interests are contingent upon achieving projected operating performance targets and satisfying other conditions specified in the related agreements and are subject to revisions as the earn-out periods progress. We record these redeemable noncontrolling interests in “mezzanine equity” in our Consolidated Balance Sheets. Each reporting period, redeemable noncontrolling interests are reported at their estimated redemption value, but not less than their initial fair value. Any adjustment to the redemption value above initial value prior to exercise will also impact retained earnings or additional paid-in capital, but will not impact net income. Adjustments as a result of currency translation will affect the redeemable noncontrolling interest balance, but do not impact retained earnings or additional paid-in capital.

Disclosure of accounting policy for subsidiaries or other investments that are consolidated, including the accounting treatment for intercompany accounts or transactions and any noncontrolling interest.

+ References+ Details

Summary of Significant Accounting Policies Earnings Per Share (Policies)	12 Months Ended
	Dec. 31, 2012
Accounting Policies [Abstract]
Earnings Per Share	Earnings Per Share (“EPS”) Basic EPS available to IPG common stockholders equals net income available to IPG common stockholders divided by the weighted-average number of common shares outstanding for the applicable period. Diluted EPS equals net income available to IPG common stockholders adjusted to exclude, if dilutive, preferred stock dividends, interest expense related to potentially dilutive securities calculated using the effective interest rate method and the benefit from the preferred stock repurchased, divided by the weighted-average number of common shares outstanding, plus any additional common shares that would have been outstanding if potentially dilutive shares had been issued. Diluted EPS reflect the potential dilution that would occur if certain potentially dilutive securities or debt obligations were exercised or converted into common stock. The potential issuance of common stock is assumed to occur at the beginning of the year (or at the time of issuance of the potentially dilutive instrument, if later) and the incremental shares are included using the treasury stock or “if-converted” method. The proceeds utilized in applying the treasury stock method consist of the amount, if any, to be paid upon exercise and, as it relates to stock-based compensation, the amount of compensation cost attributed to future service not yet recognized and any tax benefits credited to additional paid-in-capital related to the exercise. These proceeds are then assumed to be used to purchase common stock at the average market price of our stock during the period. The incremental shares (difference between the shares assumed to be issued and the shares assumed to be purchased), to the extent they would have been dilutive, are included in the denominator of the diluted EPS calculation. We may be required to calculate basic EPS using the two-class method, as a result of our redeemable noncontrolling interests. To the extent that the redemption value increases and exceeds the then-current fair value of a redeemable noncontrolling interest, net income available to IPG common stockholders (used to calculate EPS) could be negatively impacted by that increase, subject to certain limitations. The partial or full recovery of any reductions to net income available to IPG common stockholders (used to calculate EPS) is limited to any cumulative prior-period reductions. For the years ended December 31, 2012, 2011 and 2010, there was no impact to EPS for adjustments related to our redeemable noncontrolling interests.

Disclosure of accounting policy for computing basic and diluted earnings or loss per share for each class of common stock and participating security. Addresses all significant policy factors, including any antidilutive items that have been excluded from the computation and takes into account stock dividends, splits and reverse splits that occur after the balance sheet date of the latest reporting period but before the issuance of the financial statements.

+ References+ Details

Summary of Significant Accounting Policies Pension and Postretirement Benefits (Policies)	12 Months Ended
	Dec. 31, 2012
Accounting Policies [Abstract]
Pension and Postretirement Benefits	Pension and Postretirement Benefits We have pension and postretirement benefit plans covering certain domestic and international employees. We use various actuarial methods and assumptions in determining our net pension and postretirement benefit costs and obligations, including the discount rate used to determine the present value of future benefits, expected long-term rate of return on plan assets and healthcare cost trend rates. The overfunded or underfunded status of our pension and postretirement benefit plans is recorded on our Consolidated Balance Sheet.

Disclosure of accounting policy for pension and other postretirement benefit plans. This accounting policy may address (1) the types of plans sponsored by the entity, and the benefits provided by each plan (2) groups that participate in (or are covered by) each plan (3) how plan assets, liabilities and expenses are measured, including the use of any actuaries and (4) significant assumptions used by the entity to value plan assets and liabilities and how such assumptions are derived.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 87

-Paragraph 15-19, 63, 64

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 158

-Paragraph 4, 5, 6, 7

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 8

-Subparagraph m

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 106

-Paragraph 19, 20, 21, 22

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6367646&loc=d3e18780-107790

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

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-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

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+ Details

Summary of Significant Accounting Policies Stock-Based Compensation (Policies)	12 Months Ended
	Dec. 31, 2012
Accounting Policies [Abstract]
Stock-Based Compensation	Stock-Based Compensation Compensation costs related to share-based transactions, including employee stock options, are recognized in the Consolidated Financial Statements based on fair value. Stock-based compensation expense is generally recognized ratably over the requisite service period based on the estimated grant-date fair value, net of estimated forfeitures.

Summary of Carrying Amounts and Fair Values of Long-term Debt

Disclosure of accounting policy for stock option and stock incentive plans. This disclosure may include (1) the types of stock option or incentive plans sponsored by the entity (2) the groups that participate in (or are covered by) each plan (3) significant plan provisions and (4) how stock compensation is measured, and the methodologies and significant assumptions used to determine that measurement.

+ References+ Details

Debt and Credit Arrangements (Tables)

12 Months Ended

Dec. 31, 2012

Debt Disclosure [Abstract]

A summary of the carrying amounts and fair values of our long-term debt is listed below.



	Effective Interest Rate		December 31,
			2012				2011
			Book Value		Fair Value ¹		Book Value		Fair Value
6.25% Senior Unsecured Notes due 2014 (less unamortized discount of $0.2)	6.29	%	$	352.8	$	372.6	$	354.3	$	374.5
10.00% Senior Unsecured Notes due 2017 (less unamortized discount of $8.1)	10.38	%	591.9		660.8		590.6		690.0
2.25% Senior Notes due 2017 (less unamortized discount of $0.7)	2.30	%	299.3		297.8		0.0		0.0
4.00% Senior Notes due 2022 (less unamortized discount of $2.9)	4.13	%	247.1		258.7		0.0		0.0
3.75% Senior Notes due 2023 (less unamortized discount of $1.5)	4.32	%	498.5		499.7		0.0		0.0
4.75% Convertible Senior Notes due 2023 (plus unamortized premium of $0.5) ²	3.50	%	200.5		202.8		202.7		220.5
4.25% Convertible Senior Notes due 2023			0.0		0.0		403.0		405.5
Other notes payable and capitalized leases			87.3		90.8		65.1
Total long-term debt			2,277.4				1,615.7
Less: current portion ³			216.6				404.8
Long-term debt, excluding current portion			$	2,060.8			$	1,210.9


¹	See Note 11 for information on the fair value measurement of our long-term debt.


²	See Note 17 for further information regarding subsequent events.

Annual Maturities of Long-term Debt

Annual maturities are scheduled as follows based on the book value as of December 31, 2012.



2013 ¹	$	16.1
2014	352.8
2015	0.1
2016	0.1
2017	913.8
Thereafter	994.5
Total long-term debt	$	2,277.4


¹	Holders of our 4.75% Notes may require us to repurchase their notes for cash, stock or a combination, at our election, at par in March 2013.

Conversion Rates and Conversion Prices for 4.75% Notes

The conversion rates, corresponding conversion prices and conversion shares for our 4.75% Notes are listed below.



	December 31,
	2012		2011		2010
Conversion price	$	11.86	$	12.13	$	12.42
Conversion rate per note (actual number)	84.3402		82.4612		80.5153
Conversion shares	16.9		16.5		16.1

Strike Price and Cap Price for Capped Call Transaction

The strike price and cap price related to the capped call options are listed below.



	December 31,
	2012		2011		2010
Strike price	$	11.86	$	12.13	$	12.42
Cap price	$	17.43	$	17.83	$	18.26

Summary of Credit Facilities

A summary of our credit facilities is presented below.



	December 31,
	2012								2011
	Total Facility		Amount Outstanding		Letters of Credit		Total Available		Total Facility		Amount Outstanding		Letters of Credit		Total Available
Committed credit agreement	$	1,000.0	$	0.0	$	15.1	$	984.9	$	1,000.0	$	0.0	$	16.2	$	983.8
Uncommitted credit agreements	$	317.2	$	172.1	$	3.3	$	141.8	$	458.3	$	153.5	$	2.6	$	302.2

Summary of Financial Covenants in Credit Agreement

The table below sets forth the financial covenants in effect as of December 31, 2012 and thereafter.



Interest coverage ratio (not less than): ¹		5.00x
Leverage ratio (not greater than): ²		2.75x


¹	The interest coverage ratio is defined as EBITDA, as defined in the Credit Agreement, to net interest expense plus cash dividends on convertible preferred stock for the four quarters then ended.


²	The leverage ratio is defined as debt as of the last day of such fiscal quarter to EBITDA, as defined in the Credit Agreement, for the four quarters then ended.

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

Basic and Diluted Earnings Per Common Share Available to IPG Common Stockholders

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+ Details

Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2012

Earnings Per Share [Abstract]

The following sets forth basic and diluted earnings per common share available to IPG common stockholders.



	Years ended December 31,
	2012		2011		2010
Net income available to IPG common stockholders - basic	$	435.1	$	520.7	$	271.2
Adjustments: Effect of dilutive securities
Interest on 4.25% Notes ¹	0.3		1.4		1.4
Interest on 4.75% Notes	4.1		4.1		4.0
Dividends on preferred stock	11.6		11.6		0.0
Benefit from preferred stock repurchased ²	0.0		0.0		(21.7		)
Net income available to IPG common stockholders - diluted	$	451.1	$	537.8	$	254.9


Weighted-average number of common shares outstanding - basic	432.5		465.5		473.6
Add: Effect of dilutive securities
Restricted stock, stock options and other equity awards	7.2		9.1		11.3
4.25% Notes ¹	7.9		33.0		32.2
4.75% Notes	16.9		16.5		16.1
Preferred stock outstanding	16.9		16.5		0.0
Preferred stock repurchased	0.0		0.0		8.9

Weighted-average number of common shares outstanding - diluted	481.4		540.6		542.1


Earnings per share available to IPG common stockholders - basic	$	1.01	$	1.12	$	0.57
Earnings per share available to IPG common stockholders - diluted	$	0.94	$	0.99	$	0.47


¹	We retired all of our outstanding 4.25% Notes in March 2012. For purposes of calculating diluted earnings per share for 2012, the potentially dilutive shares are pro-rated based on the period they were outstanding.

Potential Shares Excluded from Diluted Earnings Per Share Calculation

The following table presents the potential shares excluded from the diluted earnings per share calculation because the effect of including these potential shares would be antidilutive.



	Years ended December 31,
	2012	2011	2010
Preferred stock outstanding	0.0	0.0	16.2
Securities excluded from the diluted earnings per share calculation because the exercise price was greater than the average market price:
Stock options ¹	6.6	8.9	15.6


¹	These options are outstanding at the end of the respective periods. In any period in which the exercise price is less than the average market price, these options have the potential to be dilutive, and application of the treasury stock method would reduce this amount.

Supplementary Data (Tables)

12 Months Ended

Dec. 31, 2012

Supplementary Data [Abstract]

Valuation and Qualifying Accounts - Allowance for Uncollectible Accounts Receivable

Valuation and Qualifying Accounts – Allowance for Uncollectible Accounts Receivable



	Years ended December 31,
	2012			2011			2010
Balance at beginning of period	$	55.4		$	63.1		$	66.0
Charges to costs and expenses	16.3			10.4			10.7
Reversals to other accounts¹	(0.2		)	(0.5		)	(0.4		)
Deductions:
Dispositions	(0.4		)	0.0			(0.5		)
Uncollectible accounts written off	(12.6		)	(16.3		)	(11.8		)
Foreign currency translation adjustment	0.5			(1.3		)	(0.9		)
Balance at end of period	$	59.0		$	55.4		$	63.1


¹	Amounts primarily relate to miscellaneous other amounts and reclassifications.

Furniture, Equipment and Leasehold Improvements, net



	December 31,
	2012			2011
Furniture and equipment	$	932.6		$	881.5
Leasehold improvements	597.2			593.0
Land and buildings	109.9			111.6
	1,639.7			1,586.1
Less: accumulated depreciation	(1,134.9		)	(1,126.3		)
Total furniture, equipment and leasehold improvements, net	$	504.8		$	459.8

Accrued Liabilities

The following table presents the components of accrued liabilities.



	December 31,
	2012		2011
Salaries, benefits and related expenses	$	478.2	$	520.6
Office and related expenses	51.6		57.9
Acquisition obligations	29.5		43.7
Interest	42.4		40.3
Professional fees	21.7		25.3
Other	104.8		142.2
Total accrued liabilities	$	728.2	$	830.0

Share Repurchase Program

The following table presents our share repurchase activity under our share repurchase programs.



	Years ended December 31,
	2012		2011
Number of shares repurchased	32.7		41.7
Aggregate cost, including fees	$	350.5	$	400.8
Average price per share, including fees	$	10.72	$	9.62

Other Income, net

Results of operations include certain items that are not directly associated with our revenue-producing operations.



	Years ended December 31,
	2012			2011		2010
Gains on sales of businesses and investments	$	88.2		$	125.9	$	4.3
Vendor discounts and credit adjustments	15.3			19.4		12.7
Other (expense) income, net	(3.0		)	4.9		(4.1		)
Total other income, net	$	100.5		$	150.2	$	12.9

Supplemental Cash Flow Information



	Years ended December 31,
	2012		2011		2010
Cash paid for interest	$	130.6	$	138.9	$	139.8
Cash paid for income taxes, net of refunds ¹	95.7		102.0		87.3


¹	Refunds of $23.5, $25.4 and $28.7 were received for the years ended December 31, 2012, 2011 and 2010, respectively.

Redeemable Noncontrolling Interest

Tabular disclosure of the useful life and salvage value of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

+ References+ Details

Acquisitions (Tables)

12 Months Ended

Dec. 31, 2012

Business Combinations [Abstract]

The following table presents changes in our redeemable noncontrolling interests.



	Years ended December 31,
	2012			2011			2010
Balance at beginning of period	$	243.4		$	291.2		$	277.8
Change in related noncontrolling interest balance	1.1			(7.7		)	1.5
Changes in redemption value of redeemable noncontrolling interests:
Additions	0.0			17.9			31.9
Redemptions and reclassifications	(14.2		)	(70.7		)	(30.1		)
Redemption value adjustments	(3.1		)	12.7			10.1
Balance at end of period	$	227.2		$	243.4		$	291.2

Cash Paid For Current And Prior Years' Acquisitions

Details of cash paid for current and prior years' acquisitions are listed below.



	Years ended December 31,
	2012			2011			2010
Cost of investment: current-year acquisitions	$	156.8		$	48.0		$	47.1
Cost of investment: prior-year acquisitions	40.6			105.1			49.6
Less: net cash acquired	(14.8		)	(18.5		)	(5.3		)
Total cost of investment ¹	182.6			134.6			91.4
Operating expense²	3.2			0.5			3.0

Total cash paid for acquisitions	$	185.8		$	135.1		$	94.4


²	Represents cash payments made that were either in excess of the contractual value or contingent upon the future employment of the former owners of acquired companies.

Tabular disclosure of redeemable noncontrolling interest (as defined) included in the statement of financial position as either a liability or temporary equity. As of the date of the statement of financial position, such redeemable noncontrolling interest is currently redeemable, as defined, for cash or other assets of the entity at (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the entity.

Goodwill and Intangible Assets Disclosure [Abstract]

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-Number 51

-Paragraph 25

-Appendix A

+ Details

Intangible Assets Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2012

Schedule of Goodwill

The changes in the carrying value of goodwill for our segments, IAN and CMG, for the years ended December 31, 2012 and 2011 are listed below.



	IAN			CMG		Total ¹
Balance as of December 31, 2010	$	2,906.0		$	462.5	$	3,368.5
Current year acquisitions	68.5			28.4		96.9
Contingent and deferred payments for prior acquisitions	0.8			0.0		0.8
Other ²	(22.4		)	0.5		(21.9		)
Balance as of December 31, 2011	$	2,952.9		$	491.4	$	3,444.3
Current year acquisitions	122.0			11.7		133.7
Contingent and deferred payments for prior acquisitions	2.2			0.0		2.2
Other ²	(2.5		)	2.9		0.4
Balance as of December 31, 2012	$	3,074.6		$	506.0	$	3,580.6


¹	For all periods presented we have not recorded a goodwill impairment charge.


²	Primarily includes foreign currency translation adjustments.

Schedule of Finite-Lived Intangible Assets by Major Class

The following table provides a summary of other intangible assets, which are included in other assets on our Consolidated Balance Sheets.



	December 31,
	2012							2011
	Gross Amount		Accumulated Amortization			Net Amount		Gross Amount		Accumulated Amortization			Net Amount
Customer lists	$	184.0	$	(96.9	)	$	87.1	$	165.9	$	(81.7	)	$	84.2
Trade names	59.7		(15.5		)	44.2		52.9		(12.3		)	40.6
Other	15.1		(5.7		)	9.4		17.3		(7.8		)	9.5
Total	$	258.8	$	(118.1	)	$	140.7	$	236.1	$	(101.8	)	$	134.3

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

The estimated annual amortization expense for other intangible assets for the next five years as of December 31, 2012 is listed below.



	2013		2014		2015		2016		2017
Estimated amortization expense	$	29.9	$	29.8	$	26.1	$	15.2	$	5.5

Schedule of Income before Income Tax, Domestic and Foreign

Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule.

+ References+ Details

Income Taxes Income Taxes (Tables)

12 Months Ended

Dec. 31, 2012

Income Tax Disclosure [Abstract]

The components of income before income taxes, equity earnings and the impact of noncontrolling interests are listed below.



	Years ended December 31,
	2012		2011		2010
Domestic	$	386.9	$	428.4	$	216.2
Foreign	287.9		310.0		234.4
Total	$	674.8	$	738.4	$	450.6

Schedule of Components of Provision for Income Taxes

The provision for income taxes is listed below.



	Years ended December 31,
	2012			2011			2010
U.S. federal income taxes (including foreign withholding taxes):
Current	$	9.4		$	0.9		$	13.7
Deferred	118.1			92.3			60.2
	127.5			93.2			73.9
State and local income taxes:
Current	17.1			12.3			16.8
Deferred	25.3			11.3			(0.1		)
	42.4			23.6			16.7
Foreign income taxes:
Current	83.2			93.1			84.8
Deferred	(39.8		)	(19.7		)	(4.1		)
	43.4			73.4			80.7
Total	$	213.3		$	190.2		$	171.3

Schedule of Effective Income Tax Rate Reconciliation



	Years ended December 31,
	2012			2011			2010
U.S. federal statutory income tax rate	35.0		%	35.0		%	35.0		%

Income tax provision at U.S. federal statutory rate	$	236.2		$	258.4		$	157.7
State and local income taxes, net of federal income tax benefit	27.3			15.3			10.8
Impact of foreign operations, including withholding taxes	8.4			(21.9		)	4.7
Change in net valuation allowance ¹	(57.3		)	(32.9		)	(2.4		)
Worthless securities deduction	0.0			(23.0		)	(2.5		)
Increases (decreases) in unrecognized tax benefits, net	24.1			(2.7		)	8.9
Other	(25.4		)	(3.0		)	(5.9		)
Provision for income taxes	$	213.3		$	190.2		$	171.3
Effective income tax rate on operations	31.6		%	25.8		%	38.0		%


¹	Reflects changes in valuation allowance that impacted the effective income tax rate for each year presented.

Schedule of Deferred Tax Assets and Liabilities

The components of deferred tax assets and liabilities are listed below.



	December 31,
	2012			2011
Postretirement/post-employment benefits	$	40.4		$	42.4
Deferred compensation	192.4			205.2
Pension costs	27.0			14.2
Basis differences in fixed assets	26.9			81.8
Rent	50.2			38.6
Interest	66.9			54.8
Accruals and reserves	51.1			55.6
Allowance for doubtful accounts	9.2			8.1
Basis differences in intangible assets	(364.9		)	(330.1		)
Investments in equity securities	(5.2		)	30.8
Tax loss/tax credit carry forwards	449.7			478.1
Restructuring and other reorganization-related costs	1.2			2.0
Other	88.3			92.2
Total deferred tax assets, net	633.2			773.7
Valuation allowance	(392.9		)	(489.9		)
Net deferred tax assets	$	240.3		$	283.8

Summary of Valuation Allowance

The change in the valuation allowance is listed below.



	Years ended December 31,
	2012			2011			2010
Balance at beginning of period	$	489.9		$	508.1		$	425.5
(Reversed) charged to costs and expenses	(49.5		)	(25.1		)	92.3
Charged (reversed) to gross tax assets and other accounts	(47.5		)	6.9			(9.7		)
Balance at end of period	$	392.9		$	489.9		$	508.1

Schedule of Unrecognized Tax Benefits Activity

The table below summarizes the activity related to our unrecognized tax benefits.



	December 31,
	2012			2011			2010
Balance at beginning of period	$	161.0		$	146.7		$	160.5
Increases as a result of tax positions taken during a prior year	28.2			5.3			4.6
Decreases as a result of tax positions taken during a prior year	(6.8		)	(18.1		)	(28.1		)
Settlements with taxing authorities	(0.7		)	(5.0		)	(10.2		)
Lapse of statutes of limitation	(1.1		)	(0.2		)	(0.6		)
Increases as a result of tax positions taken during the current year	14.0			32.3			20.5
Balance at end of period	$	194.6		$	161.0		$	146.7

Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]

Tabular disclosure of valuation allowances to reduce deferred tax assets to net realizable value, including identification of the deferred tax asset more likely than not will not be fully realized and the corresponding amount of the valuation allowance.

+ References+ Details

Incentive Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2012

Schedule of Stock-based Compensation Expense

The amount of stock-based compensation expense as reflected in salaries and related expenses in our Consolidated Statement of Operations, and the related tax benefit, are listed below.



	Years ended December 31,
	2012		2011		2010
Stock options	$	5.4	$	6.7	$	7.4
Stock-settled awards	14.9		21.9		32.7
Cash-settled awards	3.9		5.7		10.9
Performance-based awards	24.5		23.3		11.0
Employee stock purchase plan	0.6		0.7		0.5
Other ¹	1.1		4.1		4.3
Stock-based compensation expense	$	50.4	$	62.4	$	66.8
Tax benefit	$	19.7	$	22.1	$	22.1


1	Represents charges recorded for severance expense related to stock-based compensation awards.

Schedule of Stock Options Activity

The following tables are a summary of stock option activity during 2012.



	Options		Weighted- Average Exercise Price (per option)		Weighted- Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Stock options outstanding as of January 1, 2012	18.1		$12.10
Granted	0.6		11.65
Exercised	(1.2	)	9.43
Cancelled/expired	(3.0	)	25.20
Forfeited	(0.4	)	4.93
Stock options outstanding as of December 31, 2012	14.1		9.76		4.5	$	27.6
Stock options vested and expected to vest as of December 31, 2012	13.4		9.92		4.4	$	24.4
Stock options exercisable as of December 31, 2012	10.2		10.89		3.6	$	9.9

	Options		Weighted- Average Grant Date Fair Value (per option)		Weighted- Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Non-vested as of January 1, 2012	5.0		$	3.31
Granted	0.6		4.24
Vested	(1.3	)	3.94
Forfeited	(0.4	)	2.88
Non-vested as of December 31, 2012	3.9		3.29		7.0	$	18.0

Summary of Stock Options Assumptions

The fair value of each option grant has been estimated with the following weighted-average assumptions.



	Years ended December 31,
	2012		2011		2010
Expected volatility ¹	43.8	%	39.9	%	42.2	%
Expected term (years) ²	6.8		6.7		6.5
Risk free interest rate ³	1.3	%	2.8	%	3.0	%
Expected dividend yield ⁴	2.1	%	1.9	%	0.0	%


¹	The expected volatility used to estimate the fair value of stock options awarded is based on a blend of: (i) historical volatility of our common stock for periods equal to the expected term of our stock options and (ii) implied volatility of tradable forward put and call options to purchase and sell shares of our common stock.


³	The risk free rate is determined using the implied yield currently available for zero-coupon U.S. government issuers with a remaining term equal to the expected term of the options.


⁴	The expected dividend yield is calculated based on an annualized dividend of $0.24 per share in 2012 and 2011. No dividend yield was assumed in 2010 because we did not pay cash dividends on our common stock during that year.

Stock-based Compensation, Grants in Period, Weighted Average Grant Date Fair Value

Stock-based compensation awards expected to be settled in cash have been classified as liabilities in our Consolidated Balance Sheets as of December 31, 2012 and 2011.



	Years ended December 31,
	2012		2011		2010
Stock-Settled Awards:
Awards granted	0.9		0.8		3.7
Weighted-average grant-date fair value (per award)	$	11.43	$	11.94	$	8.47
Total fair value of vested awards distributed	$	63.5	$	63.1	$	36.4
Cash-Settled Awards:
Awards granted	0.1		0.0		0.6
Weighted-average grant-date fair value (per award)	$	10.94	$	8.96	$	8.50
Total fair value of vested awards distributed	$	11.1	$	10.4	$	4.8
Performance-Based Awards:
Awards granted	1.8		1.8		0.1
Weighted-average grant-date fair value (per award)	$	10.61	$	11.58	$	11.02
Total fair value of vested awards distributed	$	11.5	$	30.8	$	4.6

Schedule of Nonvested Stock Activity



	Stock-Settled Awards					Cash-Settled Awards					Performance-Based Awards
	Awards			Weighted- Average Grant-Date Fair Value (per award)		Awards			Weighted- Average Grant-Date Fair Value (per award)		Awards			Weighted- Average Grant-Date Fair Value (per award)
Non-vested as of January 1, 2012	9.2			$	6.41	1.6			$	5.85	2.0			$	10.84
Granted	0.9			11.43		0.1			10.94		1.8			10.61
Vested	(5.7		)	4.88		(1.0		)	4.62		(1.0		)	8.50
Forfeited	(0.6		)	8.16		(0.2		)	6.54		(0.1		)	11.62
Non-vested as of December 31, 2012	3.8			9.55		0.5			8.62		2.7			11.57
Total unrecognized compensation expense remaining	$	6.6				$	0.8				$	11.9
Weighted-average years expected to be recognized over	0.8					0.4					1.8

Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2012

Fair Value Disclosures [Abstract]

Assets and liabilities measured at fair value on a recurring basis



	December 31, 2012												Balance Sheet Classification
	Level 1			Level 2			Level 3			Total			Balance Sheet Classification
Assets
Cash equivalents	$	1,806.6		$	0.0		$	0.0		$	1,806.6		Cash and cash equivalents
Short-term marketable securities	16.0			0.0			0.0			16.0			Marketable securities
Long-term investments	1.5			0.0			0.0			1.5			Other assets
Total	$	1,824.1		$	0.0		$	0.0		$	1,824.1

As a percentage of total assets	13.5		%	0.0		%	0.0		%	13.5		%

Liabilities
Mandatorily redeemable noncontrolling interests ¹	$	0.0		$	0.0		$	25.3		$	25.3

	December 31, 2011												Balance Sheet Classification
	Level 1			Level 2			Level 3			Total			Balance Sheet Classification
Assets
Cash equivalents	$	1,596.5		$	0.0		$	0.0		$	1,596.5		Cash and cash equivalents
Short-term marketable securities	12.9			0.0			0.0			12.9			Marketable securities
Long-term investments	1.3			9.0			0.0			10.3			Other assets
Total	$	1,610.7		$	9.0		$	0.0		$	1,619.7

As a percentage of total assets	12.5		%	0.1		%	0.0		%	12.5		%

Liabilities
Mandatorily redeemable noncontrolling interests ¹	$	0.0		$	0.0		$	58.9		$	58.9

Assets and liabilities measured at fair value on recurring basis - level 3 reconciliation

The following tables present additional information about financial instruments measured at fair value on a recurring basis and for which we utilize Level 3 inputs to determine fair value.



	Years ended December 31,
Liabilities	2012			2011
Mandatorily redeemable noncontrolling interests - Balance at beginning of period	$	58.9		$	52.0
Level 3 additions	0.0			28.1
Level 3 reductions	(34.9		)	(28.0		)
Realized losses included in net income	(1.4		)	(6.7		)
Foreign currency translation	(0.1		)	0.1
Mandatorily redeemable noncontrolling interests - Balance at end of period	$	25.3		$	58.9

Assets and liabilities measured at fair value on a nonrecurring



	December 31, 2012
	Level 1		Level 2		Level 3		Total
Total long-term debt	$	0.0	$	2,292.4	$	90.8	$	2,383.2

Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]

Tabular disclosure of assets and liabilities by class, including financial instruments measured at fair value that are classified in shareholders' equity, if any, that are measured at fair value on a nonrecurring basis in periods after initial recognition (for example, impaired assets). Disclosures may include, but are not limited to: (a) the fair value measurements recorded and the reasons for the measurements and (b) the level within the fair value hierarchy in which the fair value measurements are categorized in their entirety (levels 1, 2, 3).

+ References+ Details

Employee Benefits (Tables)

12 Months Ended

Dec. 31, 2012

Schedule of Defined Benefit Plans Disclosures



	Domestic Pension Plan						Foreign Pension Plans						Domestic Postretirement Benefit Plan
	Domestic Pension Plan						Foreign Pension Plans						Domestic Postretirement Benefit Plan
December 31,	2012			2011			2012			2011			2012			2011
Benefit Obligation
Projected benefit obligation as of January 1	$	129.0		$	130.9		$	456.6		$	431.1		$	50.8		$	51.8
Service cost	0.0			0.0			10.2			9.6			0.2			0.2
Interest cost	6.3			6.8			21.9			23.3			2.3			2.7
Benefits paid	(10.8		)	(11.9		)	(20.4		)	(21.2		)	(5.9		)	(6.2		)
Plan participant contributions	0.0			0.0			0.6			0.7			1.7			1.4
Actuarial losses (gains)	16.1			3.2			60.0			13.5			(2.5		)	0.9
Settlements and curtailments	0.0			0.0			(6.5		)	(5.8		)	0.0			0.0
Foreign currency effect	0.0			0.0			8.9			4.9			0.0			0.0
Other	0.0			0.0			1.1			0.5			0.0			0.0

Projected benefit obligation as of December 31	$	140.6		$	129.0		$	532.4		$	456.6		$	46.6		$	50.8

Fair Value of Plan Assets
Fair value of plan assets as of January 1	$	107.2		$	95.3		$	363.6		$	312.1		$	0.0		$	0.0
Actual return on plan assets	13.7			9.7			17.6			9.0			0.0			0.0
Employer contributions	5.6			14.1			17.7			65.0			4.2			4.8
Plan participant contributions	0.0			0.0			0.6			0.7			1.7			1.4
Benefits paid	(10.8		)	(11.9		)	(20.4		)	(21.2		)	(5.9		)	(6.2		)
Settlements	0.0			0.0			(6.1		)	(5.8		)	0.0			0.0
Foreign currency effect	0.0			0.0			8.7			3.8			0.0			0.0
																0.0
Fair value of plan assets as of December 31	$	115.7		$	107.2		$	381.7		$	363.6		$	0.0		$	0.0

Funded status of the plans at December 31	$	(24.9	)	$	(21.8	)	$	(150.7	)	$	(93.0	)	$	(46.6	)	$	(50.8	)



	Domestic Pension Plan						Foreign Pension Plans						Domestic Postretirement Benefit Plan
December 31,	2012			2011			2012			2011			2012			2011
Amounts recognized in Consolidated Balance Sheets
Non-current asset	$	0.0		$	0.0		$	7.4		$	19.6		$	0.0		$	0.0
Current liability	0.0			0.0			(8.4		)	(8.1		)	(4.6		)	(4.9		)
Non-current liability	(24.9		)	(21.8		)	(149.7		)	(104.5		)	(42.0		)	(45.9		)

Net liability recognized	$	(24.9	)	$	(21.8	)	$	(150.7	)	$	(93.0	)	$	(46.6	)	$	(50.8	)

Accumulated benefit obligation	$	140.6		$	129.0		$	508.5		$	432.8

Amounts recognized in Accumulated Other Comprehensive Loss, net
Net actuarial loss	$	53.6		$	49.9		$	115.7		$	55.2		$	4.2		$	6.7
Prior service cost (credit)	0.0			0.0			1.8			1.9			(0.2		)	(0.3		)
Transition obligation	0.0			0.0			0.0			0.0			0.0			0.1

Total amount recognized	$	53.6		$	49.9		$	117.5		$	57.1		$	4.0		$	6.5



	Domestic Pension Plan				Foreign Pension Plans
December 31,	2012		2011		2012		2011
Pension plans with underfunded or unfunded accumulated benefit obligation
Aggregate projected benefit obligation	$	140.6	$	129.0	$	515.8	$	132.6
Aggregate accumulated benefit obligation	140.6		129.0		497.3		127.0
Aggregate fair value of plan assets	115.7		107.2		358.5		20.2

Schedule of Net Benefit Costs

The components of net periodic benefit cost and key assumptions are listed below.



	Domestic Pension Plan									Foreign Pension Plans									Domestic Postretirement Benefit Plan
Years ended December 31,	2012			2011			2010			2012			2011			2010			2012			2011			2010
Service cost	$	0.0		$	0.0		$	0.0		$	10.2		$	9.6		$	9.7		$	0.2		$	0.2		$	0.3
Interest cost	6.3			6.8			7.3			21.9			23.3			22.8			2.3			2.7			2.8
Expected return on plan assets	(7.7		)	(7.5		)	(7.0		)	(18.2		)	(19.0		)	(17.0		)	0.0			0.0			0.0
Settlement and curtailment losses	0.0			0.0			0.0			0.7			0.0			1.4			0.0			0.0			0.0
Amortization of:
Transition obligation	0.0			0.0			0.0			0.0			0.0			0.0			0.2			0.1			0.2
Prior service cost (credit)	0.0			0.0			0.0			0.2			0.2			0.2			(0.1		)	(0.1		)	(0.1		)
Unrecognized actuarial losses	6.4			6.6			8.6			1.0			0.7			1.9			0.0			0.0			0.0
Net periodic cost	$	5.0		$	5.9		$	8.9		$	15.8		$	14.8		$	19.0		$	2.6		$	2.9		$	3.2

Assumptions



	Domestic Pension Plan						Foreign Pension Plans						Domestic Postretirement Benefit Plan
Years ended December 31,	2012		2011		2010		2012		2011		2010		2012		2011		2010
Net periodic cost
Discount rate	5.00	%	5.50	%	5.51	%	5.00	%	5.45	%	5.50	%	5.00	%	5.50	%	5.50	%
Rate of compensation increase	N/A		N/A		N/A		3.66	%	4.37	%	4.43	%	N/A		N/A		N/A
Expected return on plan assets	7.25	%	7.50	%	7.49	%	5.02	%	5.88	%	5.84	%	N/A		N/A		N/A
Benefit obligation
Discount rate	4.00	%	5.00	%	5.50	%	4.32	%	5.00	%	5.45	%	4.00	%	5.00	%	5.50	%
Rate of compensation increase	N/A		N/A		N/A		3.57	%	3.66	%	4.34	%	N/A		N/A		N/A
Health care cost trend rate assumed for next year
Initial rate (weighted-average)													8.00	%	8.00	%	8.50	%
Year ultimate rate is reached													2019		2016		2017
Ultimate rate													5.00	%	5.50	%	5.50	%

Fair Value of Pension Plan Assets



	December 31, 2012								December 31, 2011
Asset Class	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Investment funds	$	22.3	$	327.9	$	48.2	$	398.4	$	18.4	$	307.1	$	43.8	$	369.3
Insurance contracts	0.0		24.8		0.0		24.8		0.0		24.8		0.0		24.8
Limited partnerships	0.0		0.0		39.8		39.8		0.0		0.0		41.1		41.1
Other	28.6		5.5		0.3		34.4		31.1		4.4		0.1		35.6
Total	$	50.9	$	358.2	$	88.3	$	497.4	$	49.5	$	336.3	$	85.0	$	470.8

Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets

The following table presents additional information about our domestic and foreign pension plans' assets for which we utilize Level 3 inputs to determine fair value.



	Year ended December 31, 2012									Year ended December 31, 2011
	Investment Funds		Limited Partnerships			Other		Total		Investment Funds			Limited Partnerships			Other		Total
Balance at beginning of period	$	43.8	$	41.1		$	0.1	$	85.0	$	53.9		$	3.2		$	0.1	$	57.2
Actual return on assets:
Assets sold during the year	0.0		0.0			0.0		0.0		0.1			0.0			0.0		0.1
Assets still held at year end	2.2		(1.3		)	0.0		0.9		(0.6		)	(1.2		)	0.0		(1.8		)
Net purchases, sales and settlements	2.2		0.0			0.2		2.4		(9.6		)	39.1			0.0		29.5
Balance at end of period	$	48.2	$	39.8		$	0.3	$	88.3	$	43.8		$	41.1		$	0.1	$	85.0

Schedule of Allocation of Plan Assets

As of December 31, 2012, the weighted-average target and actual asset allocations relating to our domestic and foreign pension plans' assets are listed below.



			December 31,
Asset Class	2013 Target Allocation		2012		2011
Equity securities	23	%	22	%	20	%
Fixed income securities	48	%	44	%	47	%
Real estate	5	%	5	%	1	%
Other	24	%	29	%	32	%
Total	100	%	100	%	100	%

Schedule of Estimated Future Benefit Payments

The following estimated future benefit payments, which reflect future service, as appropriate, are expected to be paid in the years indicated below.



Years	Domestic Pension Plan		Foreign Pension Plans		Domestic Postretirement Benefit Plan
2013	$	10.1	$	22.0	$	5.0
2014	9.8		23.0		4.8
2015	9.6		23.2		4.7
2016	9.3		26.0		4.4
2017	9.1		25.9		4.2
2018 - 2022	42.8		143.5		17.5

Schedule of Federal Subsidies

The following federal subsidies are expected to be received in the years indicated below.



Years	Domestic Postretirement Benefit Plan
2013	$	0.4
2014	0.5
2015	0.5
2016	0.5
2017	0.5
2018 - 2022	0.9

Tabular disclosure of one or more of the entity's defined benefit pension plans or one or more other defined benefit postretirement plans, separately for pension plans and other postretirement benefit plans including the entity's schedule of fair value of plan assets for defined benefit or other postretirement plans.

Schedule of Segment Reporting Information, by Segment

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-Paragraph 4, 7, 16, 20, 21

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef

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+ Details

Segment Information (Tables)

12 Months Ended

Dec. 31, 2012

Segment Reporting [Abstract]

Summarized financial information concerning our reportable segments is shown in the following table.



	Years ended December 31,
	2012			2011			2010
Revenue:
IAN	$	5,728.5		$	5,891.8		$	5,468.4
CMG	1,227.7			1,122.8			1,038.9
Total	$	6,956.2		$	7,014.6		$	6,507.3

Segment operating income:
IAN	$	701.1		$	728.0		$	615.2
CMG	114.5			101.2			78.8
Corporate and other	(137.3		)	(142.0		)	(145.3		)
Total	678.3			687.2			548.7

Interest expense	(133.5		)	(136.8		)	(139.7		)
Interest income	29.5			37.8			28.7
Other income, net	100.5			150.2			12.9
Income before income taxes	$	674.8		$	738.4		$	450.6

Depreciation and amortization of fixed assets and intangible assets:
IAN	$	119.7		$	125.7		$	116.7
CMG	14.4			12.8			14.2
Corporate and other	13.6			12.4			17.5
Total	$	147.7		$	150.9		$	148.4

Capital expenditures:
IAN	$	97.5		$	94.1		$	83.5
CMG	26.7			16.9			6.9
Corporate and other	45.0			29.3			5.9
Total	$	169.2		$	140.3		$	96.3

	December 31,
	2012			2011
Total assets:
IAN	$	11,035.3		$	10,589.2
CMG	1,073.1			1,019.9
Corporate and other	1,385.5			1,299.6
Total	$	13,493.9		$	12,908.7

Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas

Revenue and long-lived assets, excluding intangible assets, are presented by major geographic area in the following table.



	Revenue						Long-Lived Assets
	Years ended December 31,						December 31,
	2012		2011		2010		2012		2011
Domestic	$	3,803.6	$	3,887.7	$	3,709.9	$	502.5	$	477.2
International:
United Kingdom	572.0		539.4		469.6		64.3		65.2
Continental Europe	823.1		908.9		863.2		76.0		72.1
Asia Pacific	838.1		741.7		639.8		88.0		78.4
Latin America	450.1		444.4		363.3		70.5		69.1
Other	469.3		492.5		461.5		38.8		34.5
Total international	3,152.6		3,126.9		2,797.4		337.6		319.3
Total consolidated	$	6,956.2	$	7,014.6	$	6,507.3	$	840.1	$	796.5

Tabular disclosure of information concerning material long-lived assets (excluding financial instruments, customer relationships with financial institutions, mortgage and other servicing rights, deferred policy acquisition costs, and deferred taxes assets) located in identified geographic areas and/or the amount of revenue from external customers attributed to that country from which revenue is material. An entity may also provide subtotals of geographic information about groups of countries.

+ References+ Details

Commitments and Contingencies Disclosure [Abstract]

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

+ References+ Details

Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2012

Schedule of Net Rent Expense

Net rent expense is listed in the table below.



	Years ended December 31,
	2012			2011			2010
Gross rent expense	$	358.5		$	369.5		$	365.2
Third-party sublease rental income	(17.5		)	(19.4		)	(20.0		)
Net rent expense	$	341.0		$	350.1		$	345.2

Schedule of Future Minimum Lease Commitments



Period	Rent Obligations		Sublease Rental Income			Net Rent
2013	$	309.1	$	(26.9	)	$	282.2
2014	275.8		(14.7		)	261.1
2015	243.4		(7.3		)	236.1
2016	200.3		(2.1		)	198.2
2017	164.2		(0.6		)	163.6
Thereafter	675.8		(0.3		)	675.5
Total	$	1,868.6	$	(51.9	)	$	1,816.7

Schedule of Contingent Acquisition Obligations

The following table details the estimated future contingent acquisition obligations payable in cash as of December 31, 2012.



	2013			2014			2015			2016			2017		Thereafter		Total
Deferred acquisition payments	$	26.0		$	12.4		$	9.7		$	46.4		$	18.9	$	2.0	$	115.4
Redeemable noncontrolling interests and call options with affiliates ¹	20.5			43.8			32.9			5.7			2.2		10.6		115.7
Total contingent acquisition payments	46.5			56.2			42.6			52.1			21.1		12.6		231.1
Less: cash compensation expense included above	(0.7		)	(0.6		)	(0.8		)	(0.2		)	0.0		0.0		(2.3		)
Total	$	45.8		$	55.6		$	41.8		$	51.9		$	21.1	$	12.6	$	228.8

Results by Quarter (Unaudited) Results by Quarter (Tables)

12 Months Ended

Dec. 31, 2012

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information

Results by Quarter (Unaudited)



	Three Months Ended March 31,						Three Months Ended June 30,						Three Months Ended September 30,					Three Months Ended December 31,
	2012			2011			2012			2011			2012			2011		2012		2011
Revenue	$	1,506.8		$	1,474.8		$	1,715.7		$	1,740.7		$	1,670.4		$	1,726.5	$	2,063.3	$	2,072.6
Salaries and related expenses	1,104.9			1,080.1			1,088.9			1,095.7			1,064.3			1,088.0		1,133.8		1,138.3
Office and general expenses	441.3			440.0			450.4			471.0			474.7			465.3		519.6		549.0
Operating (loss) income	(39.4		)	(45.3		)	176.4			174.0			131.4			173.2		409.9		385.3
Other (expense) income, net ¹	(1.3		)	(6.1		)	4.7			5.3			1.7			137.1		95.4		13.9
Total (expenses) and other income¹	(25.9		)	(29.7		)	(21.3		)	(18.1		)	(23.2		)	113.9		66.9		(14.9		)
(Benefit of) provision for income taxes	(19.2		)	(21.5		)	50.1			47.6			41.9			70.4		140.5		93.7
Net (loss) income ¹	(45.7		)	(53.2		)	105.5			108.9			67.7			217.5		337.1		278.3
Net (loss) income available to IPG common stockholders ¹	$	(45.9	)	$	(48.1	)	$	99.0		$	101.7		$	68.7		$	208.1	$	313.3	$	259.0
(Loss) earnings per share available to IPG common stockholders:
Basic	$	(0.10	)	$	(0.10	)	$	0.23		$	0.21		$	0.16		$	0.45	$	0.74	$	0.58
Diluted	$	(0.10	)	$	(0.10	)	$	0.22		$	0.19		$	0.15		$	0.40	$	0.68	$	0.50

Dividends declared per common stock	$	0.06		$	0.06		$	0.06		$	0.06		$	0.06		$	0.06	$	0.06	$	0.06

^[1]

[1]	The three months ended December 31, 2012 and the three months ended September 30, 2011, include a pre-tax gain of $93.6 and $132.2, respectively, related to the sale of our holdings in Facebook.

Summary of Significant Accounting Policies (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Leasehold improvements, useful life	the shorter of the useful life or the remaining lease term
Number of Reporting Units for Purposes of Annual Goodwill Impairment Test	11
Foreign currency transaction pre-tax loss	$ 1.2	$ 0.9	$ 0.7
Minimum [Member]
Buildings, useful life	10 years
Furniture, equipment and computer software costs, useful life minimum	3 years
Finite-Lived Intangible Asset, Useful Life	7 years
Maximum [Member]
Buildings, useful life	35 years
Furniture, equipment and computer software costs, useful life minimum	7 years
Finite-Lived Intangible Asset, Useful Life	15 years

Long-term debt, excluding current portion

The aggregate foreign currency transaction gain (loss) (both realized and unrealized) included in determining net income for the reporting period. Excludes foreign currency transactions designated as hedges of net investment in a foreign entity and intercompany foreign currency transactions that are of a long-term nature, when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting enterprise's financial statements. For certain enterprises, primarily banks, that are dealers in foreign exchange, foreign currency transaction gains (losses) may be disclosed as dealer gains (losses).

+ References+ Details

Long-term Debt (Details) (USD $)
In Millions, unless otherwise specified

12 Months Ended

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2012

6.25% Senior Unsecured Notes due 2014

Dec. 31, 2011

6.25% Senior Unsecured Notes due 2014

Dec. 31, 2012

10.00% Senior Unsecured Notes due 2017

Dec. 31, 2011

10.00% Senior Unsecured Notes due 2017

Dec. 31, 2012

2.25% Senior Notes due 2017

Nov. 08, 2012

2.25% Senior Notes due 2017

Dec. 31, 2011

2.25% Senior Notes due 2017

Dec. 31, 2012

4.00% Senior Notes due 2022

Mar. 02, 2012

4.00% Senior Notes due 2022

Dec. 31, 2011

4.00% Senior Notes due 2022

Dec. 31, 2012

3.75% Senior Notes due 2023

Nov. 08, 2012

3.75% Senior Notes due 2023

Dec. 31, 2011

3.75% Senior Notes due 2023

Dec. 31, 2012

4.75% Convertible Senior Notes due 2023

Dec. 31, 2011

4.75% Convertible Senior Notes due 2023

Dec. 31, 2012

4.25% Convertible Senior Notes due 2023

Dec. 31, 2011

4.25% Convertible Senior Notes due 2023

Dec. 31, 2012

Other notes payable and capitalized leases

Dec. 31, 2011

Other notes payable and capitalized leases

Dec. 31, 2012

7.25% Senior Notes due 2011

Debt Instrument

Effective Interest Rate

6.29%

10.38%

2.30%

4.13%

4.32%

3.50%

Stated Interest Rate

6.25%

10.00%

2.25%

4.00%

3.75%

4.75%

4.25%

7.25%

Book Value

$ 352.8

$ 354.3

$ 591.9

$ 590.6

$ 299.3

$ 0

$ 247.1

$ 0

$ 498.5

$ 0

$ 200.5

^[1]

$ 202.7

$ 0

$ 403.0

$ 87.3

$ 65.1

Fair Value

372.6

^[2]

374.5

660.8

^[2]

690.0

297.8

^[2]

258.7

^[2]

499.7

^[2]

202.8

^[2]

220.5

^[2]

405.5

90.8

^[2]

Total long-term debt

2,277.4

1,615.7

Less: current portion

216.6

^[1],[3]

404.8

^[1],[3]

2,060.8

1,210.9

Face Value

600.0

300.0

250.0

500.0

200.0

Debt Maturity Date

Nov. 15, 2014

Jul. 15, 2017

Nov. 15, 2017

Mar. 15, 2022

Feb. 15, 2023

Mar. 15, 2023

Aug. 15, 2011

Unamortized Discount

0.2

8.1

0.7

2.9

3.2

1.5

Unamortized Premium

$ 0.5

[1]	See Note 17 for further information regarding subsequent events.
[2]	See Note 11 for information on the fair value measurement of our long-term debt.
[3]	On March 15, 2013, holders of our 4.75% Convertible Senior Notes due 2023 (the “4.75% Notes”) may require us to repurchase their notes for cash, stock or a combination, at our election, at par, and accordingly, we included these notes in the current portion of long-term debt on our December 31, 2012 Consolidated Balance Sheet. We included our 4.25% Convertible Senior Notes due 2023 (the “4.25% Notes”) in the current portion of long-term debt on our December 31, 2011 Consolidated Balance Sheet because holders of the 4.25% Notes had a repurchase option on March 15, 2012 for cash at par. The 4.25% Notes were retired in the first quarter of 2012.

Debt and Credit Arrangements Annual Maturities (Details) (USD $)
In Millions, unless otherwise specified

Dec. 31, 2012

Dec. 31, 2011

Maturities of Long-term Debt [Abstract]

2013

$ 16.1

^[1]

352.8

0.1

0.1

913.8

994.5

$ 2,277.4

$ 1,615.7

[1]	The interest coverage ratio is defined as EBITDA, as defined in the Credit Agreement, to net interest expense plus cash dividends on convertible preferred stock for the four quarters then ended.

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References+ Details

Debt and Credit Arrangements Convertible Securities (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended	1 Months Ended	12 Months Ended			12 Months Ended
	Dec. 31, 2012	Mar. 31, 2012 4.25% Notes	Dec. 31, 2011 4.25% Notes	Dec. 31, 2012 4.25% Notes	Mar. 26, 2012 4.25% Notes	Dec. 31, 2012 4.75% Notes	Dec. 31, 2011 4.75% Notes	Dec. 31, 2010 4.75% Notes
Debt Instrument
Amount redeemed or repurchased for cash					$ 399.6
Accrued interest on debt redeemed or repurchased		0.5
Amount of debt converted in common stock		$ 0.4
Number of shares converted from convertible debt		30,000
4.25% Notes, number of convertible shares eliminated from eligible diluted share count due to retirement				33,000,000
4.75% Notes, terms of conversion feature						convertible at any time if the average price of our common stock for 20 trading days immediately preceding the conversion date is greater than or equal to a specified percentage of the conversion price; this percentage was equal to 115.5% in 2012 and declines 0.5% each year until it reaches 110% at maturity
4.75% Notes, earliest convertible date	Feb. 15, 2023
4.75% Notes, latest convertible date	Mar. 15, 2023
4.75% Notes, conversion price						$ 11.86	$ 12.13	$ 12.42
4.75% Notes, conversion rate per note		82.4612				84.3402	82.4612	80.5153
4.75% Notes, conversion shares						16,900,000	16,500,000	16,100,000
Repurchase of 4.75% Notes for cash, common stock, or combination, earliest date						Mar. 15, 2013
Repurchase of 4.75% Notes for cash, common stock, or combination, latest date						Mar. 15, 2018
Repurchase of 4.75% Notes for cash, common stock, or combination due to change of control events, date						Mar. 15, 2013
Redemption of 4.75% Notes for cash, date						Mar. 15, 2013
Convertible Debt Redemption Price						100.00%
Repurchase of 4.25% Notes for cash, date			Mar. 15, 2012

Debt and Credit Arrangements Capped Call (Details) (4.75% Notes, USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2010	Dec. 31, 2011
4.75% Notes
Debt Instrument
Capped call, strike price	11.86	12.42	12.13
Capped call, cap price	17.43	18.26	17.83
Capped call, number of shares that may be purchased	16.9
Capped call, expiration date	Apr. 02, 2013
Capped call, cost of options		$ 22.8

Debt and Credit Arrangements Interest Rate Swaps (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Interest Rate Swaps [Abstract]
Notional Amount of Interest Rate Cash Flow Hedge Derivatives	$ 300.0
Ending date hedged in interest rate cash flow hedge	Dec. 31, 2013
Cash paid to settle interest rate swap agreements	24.0
Derivative Instruments, Loss Recognized in Income, Net	2.1
Interest Rate Cash Flow Hedge Liability at Fair Value	21.9
Derivative Instruments, Loss Reclassified from Accumulated OCI into Income, Effective Portion, Net	0.3
Cash Flow Hedge Loss to be Reclassified within Twelve Months	$ (1.7)

The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

+ References+ Details

Interest coverage ratio (not less than):

The amount of net gains and losses recognized in income during the period on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges, on derivative instruments designated and qualifying as hedging instruments in cash flow hedges, and on derivative instruments not designated as hedging instruments.

+ References+ Details

Credit Facility (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	May 31, 2011
Line of Credit Facility [Line Items]
Credit Facilities, total facility	$ 1,000.0
Credit Facilities, weighted-average interest rate		5.00%
Credit Agreement, expiration date	May 31, 2016
Credit Agreement, borrowing capacity prior to amendment			650.0
Credit Agreement, limit on letters of credit	200.0
Credit Agreement, margin for base rate advances	0.40%
Credit Agreement, margin for Eurocurrency rate advances	1.40%
Credit Agreement, annual rate for fronting fees accrued on letters of credit	0.25%
Credit Agreement, facility fee annual rate	0.35%
Covenant Modification Expiration Date	Aug. 15, 2013
Committed credit agreement
Line of Credit Facility [Line Items]
Credit Facilities, total facility	1,000.0	1,000.0
Credit Facilities, amount outstanding	0	0
Credit Facilities, letters of credit	15.1	16.2
Credit Facilities, total available	984.9	983.8
Uncommitted credit agreements
Line of Credit Facility [Line Items]
Credit Facilities, total facility	317.2	458.3
Credit Facilities, amount outstanding	172.1	153.5
Credit Facilities, letters of credit	3.3	2.6
Credit Facilities, total available	$ 141.8	$ 302.2
Credit Facilities, weighted-average interest rate	4.00%	5.00%

Financial Covenants (Details)

12 Months Ended

Dec. 31, 2012

Debt Disclosure [Abstract]

5.00x

^[1]

Leverage ratio (not greater than):

2.75x

^[2]

[1]	The interest coverage ratio is defined as EBITDA, as defined in the Credit Agreement, to net interest expense plus cash dividends on convertible preferred stock for the four quarters then ended.
[2]	The leverage ratio is defined as debt as of the last day of such fiscal quarter to EBITDA, as defined in the Credit Agreement, for the four quarters then ended.

Debt and Credit Arrangements Debt Narrative (Details) (USD $) In Millions, unless otherwise specified			12 Months Ended			12 Months Ended		1 Months Ended	12 Months Ended		1 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 10.00% Senior Unsecured Notes due 2017	Dec. 31, 2012 2.25% Senior Notes due 2017	Nov. 08, 2012 2.25% Senior Notes due 2017	Dec. 31, 2012 3.75% Senior Notes due 2023	Nov. 08, 2012 3.75% Senior Notes due 2023	Aug. 31, 2011 7.25% Senior Notes due 2011	Dec. 31, 2012 4.00% Senior Notes due 2022	Mar. 02, 2012 4.00% Senior Notes due 2022	Mar. 31, 2012 4.25% Convertible Senior Notes due 2023
Debt Instrument
Extinguishment of Debt, Amount								$ 36.3			$ 400.0
Repayment of Long Term Debt, Including Accrued and Unpaid Interest								37.6
Debt Instrument, Frequency of Periodic Payment				semi-annually		semi-annually			semi-annually
Debt Instrument, Date of First Required Payment				May 15, 2013		Aug. 15, 2013			Sep. 15, 2012
Repurchase Price Percentage Due to Change of Control				101.00%		101.00%			101.00%
Long-term Debt, Fair Value					299.3		498.5			246.8
Unamortized debt issuance costs	27.5	25.5			2.1		3.8			2.5
Debt Instrument, Call Date, Earliest			Jul. 15, 2013
Debt Early Redemption Premium			105.00%
Cash debt pooling arrangements, amount netted	$ 1,166.3	$ 1,106.6

Convertible Preferred Stock Convertible Preferred Stock (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Features of Convertible Preferred Stock [Abstract]
Convertible preferred stock, interest rate, stated percentage	5.25%	5.25%
Liquidation preference per share	$ 1,000.00	$ 1,000.00
Shares outstanding (actual number)	200,000	200,000	200,000	221,474
Conversion rate per share	76.2197	76.2197	74.4500	73.1904
Conversion price	$ 13.12	$ 13.12	$ 13.43	$ 13.66
Conversion shares	16,900,000	16,900,000	16,500,000	16,200,000
Preferred shares purchased (actual number)				303,526
Payments for repurchase of preferred stock including transaction costs				$ 267.6
Sale of preferred stock price per share				$ 869.86
Payment of unpaid dividends on preferred stock purchased				1.9
Preferred stock purchased carrying value				293.3
Benefit from preferred stock repurchased		0	0	25.7
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs				10.2
Preferred stock declared, annual dividends per share		$ 52.50
Preferred stock dividends		$ (11.6)	$ (11.6)	$ (15.6)
Preferred stock, quarterly dividend amount per share	$ 13.125

Earnings Per Share Basic and Diluted (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified

3 Months Ended

12 Months Ended

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2011

Sep. 30, 2011

Jun. 30, 2011

Mar. 31, 2011

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

Net income available to IPG common stockholders - basic

$ 313.3

$ 68.7

^[1]

$ 99.0

$ (45.9)

$ 259.0

$ 208.1

$ 101.7

$ (48.1)

$ 435.1

$ 520.7

$ 271.2

Preferred stock dividends

11.6

Benefit from preferred stock repurchased

(21.7)

^[2]

Net income available to IPG common stockholders - diluted

451.1

537.8

254.9

Weighted-average number of common shares outstanding - basic

432.5

465.5

473.6

Restricted stock, stock options and other equity awards

7.2

9.1

11.3

Preferred stock outstanding

16.9

16.5

Preferred stock repurchased

8.9

Weighted-average number of common shares outstanding - diluted

481.4

540.6

542.1

Earnings per share available to IPG common stockholders - basic

$ 0.74

$ 0.16

$ 0.23

$ (0.10)

$ 0.58

$ 0.45

$ 0.21

$ (0.10)

$ 1.01

$ 1.12

$ 0.57

Earnings per share available to IPG common stockholders - diluted

$ 0.68

$ 0.15

$ 0.22

$ (0.10)

$ 0.50

$ 0.40

$ 0.19

$ (0.10)

$ 0.94

$ 0.99

$ 0.47

Dividends declared and associated with preferred stock repurchased

4.0

4.25% Notes

Interest on convertible debt

0.3

^[3]

1.4

Convertible debt securities

7.9

^[3]

33.0

32.2

4.75% Notes

Interest on convertible debt

$ 4.1

$ 4.0

Convertible debt securities

16.9

16.5

16.1

[1]	The three months ended December 31, 2012 and the three months ended September 30, 2011, include a pre-tax gain of $93.6 and $132.2, respectively, related to the sale of our holdings in Facebook.
[2]	For the year ended December 31, 2010, the benefit from the preferred stock repurchased is excluded from net income available to IPG common stockholders for purposes of calculating diluted earnings per share since the associated common shares, if converted, were dilutive. In addition, the benefit is also net of $4.0 of preferred dividends that were declared during the first quarter of 2010 and associated with the preferred stock repurchased.
[3]	We retired all of our outstanding 4.25% Notes in March 2012. For purposes of calculating diluted earnings per share for 2012, the potentially dilutive shares are pro-rated based on the period they were outstanding.

Antidilutive Shares (Details)
In Millions, unless otherwise specified

12 Months Ended

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

Antidilutive Securities

Antidilutive Stock Options, Exercise Price Greater Than Average Market Price

6.6

^[1]

8.9

^[1]

15.6

^[1]

Preferred stock outstanding

Antidilutive Securities

Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount

16.2

[1]	These options are outstanding at the end of the respective periods. In any period in which the exercise price is less than the average market price, these options have the potential to be dilutive, and application of the treasury stock method would reduce this amount.

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

Movement in Valuation Allowances and Reserves [Roll Forward]

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Antidilution

-URI http://asc.fasb.org/extlink&oid=6505113

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Diluted Earnings Per Share

-URI http://asc.fasb.org/extlink&oid=6510752

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Contingent Stock Agreement

-URI http://asc.fasb.org/extlink&oid=6508534

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 128

-Paragraph 40

-Subparagraph c

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 128

-Paragraph 13, 14

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Emerging Issues Task Force (EITF)

-Number 07-4

-Paragraph 4

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 128

-Paragraph 171

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Valuation and Qualifying Accounts - Allowance for Uncollectible Accounts Receivable (Details) (USD $)
In Millions, unless otherwise specified

12 Months Ended

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

Balance at beginning of period

$ 55.4

$ 63.1

$ (66.0)

Charges to costs and expenses

16.3

10.4

10.7

Reversals to other accounts

(0.2)

^[1]

(0.5)

^[1]

(0.4)

^[1]

Deductions:

Dispositions

(0.4)

(0.5)

Uncollectible accounts written off

(12.6)

(16.3)

(11.8)

Foreign currency translation adjustment

0.5

(1.3)

(0.9)

Balance at end of period

$ 59.0

$ 55.4

$ 63.1

[1]	Amounts primarily relate to miscellaneous other amounts and reclassifications.

Furniture, Equipment and Leasehold Improvements, net (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Property, Plant and Equipment [Abstract]
Furniture and equipment	$ 932.6	$ 881.5
Leasehold improvements	597.2	593.0
Land and buildings	109.9	111.6
Furniture, equipment and leasehold improvements	1,639.7	1,586.1
Less: Accumulated depreciation	(1,134.9)	(1,126.3)
Total furniture, equipment and leasehold improvements, net	504.8	459.8
Depreciation and amortization expense	$ 124.3	$ 130.7	$ 129.0

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

+ References+ Details

Gross amount of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References+ Details

Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References+ Details

Accrued Liabilities (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Accrued Liabilities [Abstract]
Salaries, benefits and related expenses	$ 478.2	$ 520.6
Office and related expenses	51.6	57.9
Acquisition obligations	29.5	43.7
Interest	42.4	40.3
Professional fees	21.7	25.3
Other	104.8	142.2
Total accrued liabilities	$ 728.2	$ 830.0

Carrying value as of the balance sheet date of obligations incurred through that date and payable for professional fees, such as for legal and accounting services received. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 20

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section 45

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=6361293&loc=d3e6935-107765

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Current Liabilities

-URI http://asc.fasb.org/extlink&oid=6509677

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 43

-Section A

-Paragraph 7

-Chapter 3

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.20)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section 45

-Paragraph 6

-URI http://asc.fasb.org/extlink&oid=6361293&loc=d3e6911-107765

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 43

-Section A

-Paragraph 8

-Chapter 3

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References+ Details

Carrying value as of the balance sheet date of obligations incurred through that date and payable arising from transactions not otherwise specified in the taxonomy. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References+ Details

Share Repurchase Program (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Number of shares repurchased	32.7	41.7
Aggregated cost, including fees	$ 350.5	$ 400.8
Average price per share, including fees	$ 10.72	$ 9.62
2012 Share Repurchase Program
Share repurchase program, initial authorized amount	400.0
Share repurchase program, increased authorized amount	300.0
Stock Repurchase Program, Remaining Authorized Repurchase Amount	100.0
2011 Share Repurchase Program
Share repurchase program, initial authorized amount		450.0
Share repurchase program, increased authorized amount		$ 300.0

Other Nonoperating Income (Expense) [Abstract]

Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

+ References+ Details

Other Income, Net (Details) (USD $)
In Millions, unless otherwise specified

3 Months Ended

12 Months Ended

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2011

Sep. 30, 2011

Jun. 30, 2011

Mar. 31, 2011

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

Gains on sales of businesses and investments

$ 88.2

$ 125.9

$ 4.3

Vendor discounts and credit adjustments

15.3

19.4

12.7

Other (expense) income, net

(3.0)

4.9

(4.1)

Total other income, net

95.4

1.7

^[1]

4.7

(1.3)

13.9

137.1

5.3

(6.1)

100.5

150.2

12.9

Net proceeds from sale of portion of Facebook

94.8

133.5

Gain on sale of portion of Facebook

$ 93.6

$ 132.2

[1]	The three months ended December 31, 2012 and the three months ended September 30, 2011, include a pre-tax gain of $93.6 and $132.2, respectively, related to the sale of our holdings in Facebook.

The cash inflow associated with the sale, maturity and collection of all investments such as debt, security and so forth during the period.

Supplemental Cash Flow Information [Abstract]

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3179-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 16

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

-Paragraph 18

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 15

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 31

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Supplemental Cash Flow Information (Details) (USD $)
In Millions, unless otherwise specified

12 Months Ended

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

Cash paid for interest

$ 130.6

$ 138.9

$ 139.8

Cash paid for income taxes, net of refunds

95.7

^[1]

102.0

^[1]

87.3

^[1]

Proceeds from Income Tax Refunds

$ 23.5

$ 25.4

$ 28.7

[1]	Refunds of $23.5, $25.4 and $28.7 were received for the years ended December 31, 2012, 2011 and 2010, respectively.

The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

+ References+ Details

Redeemable Noncontrolling Interests (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Redeemable Noncontrolling Interests
Balance at beginning of period	$ 243.4	$ 291.2	$ 277.8
Change in related noncontrolling interest balance	1.1	(7.7)	1.5
Changes in redemption value of redeemable noncontrolling interests:
Additions	0	17.9	31.9
Redemptions and reclassifications	(14.2)	(70.7)	(30.1)
Redemption value adjustments	(3.1)	12.7	10.1
Balance at end of period	$ 227.2	$ 243.4	$ 291.2

Decrease in noncontrolling interest (for example, but not limited to, redeeming or purchasing the interests of noncontrolling shareholders, issuance of shares (interests) by the non-wholly owned subsidiary to the parent entity for other than cash, and a buyback of shares (interest) by the non-wholly owned subsidiary from the noncontrolling interests).

+ References+ Details

The aggregate fair value as of the reporting date of all noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. This item includes noncontrolling interest holder's ownership (or holders' ownership) regardless of the type of equity interest (common, preferred, other) including all potential organizational (legal) forms of the investee entity.

Total cash paid for acquisitions

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 480

-SubTopic 10

-Section S99

-Paragraph 3A

-Subparagraph (12)(c)

-URI http://asc.fasb.org/extlink&oid=14643745&loc=SL6540498-122764

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 480

-SubTopic 10

-Section S99

-Paragraph 3A

-Subparagraph (16)(c)

-URI http://asc.fasb.org/extlink&oid=14643745&loc=SL6540498-122764

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 480

-SubTopic 10

-Section S99

-Paragraph 3A

-Subparagraph 15

-URI http://asc.fasb.org/extlink&oid=14643745&loc=SL6540498-122764

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 480

-SubTopic 10

-Section S99

-Paragraph 3A

-Subparagraph 14

-URI http://asc.fasb.org/extlink&oid=14643745&loc=SL6540498-122764

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Emerging Issues Task Force (EITF)

-Number D-98

-Paragraph 43

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Emerging Issues Task Force (EITF)

-Number D-98

-Paragraph 43

-Subparagraph c

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 51

-Paragraph 27

-Subparagraph c

-Appendix A

+ Details

Acquisitions (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Business Acquisitions
Number of completed acquisitions	12	22	5
Goodwill and intangible assets recorded for acquisitions	$ 201.0	$ 133.0	$ 63.0
IAN
Business Acquisitions
Number of completed acquisitions	8	18	4
CMG
Business Acquisitions
Number of completed acquisitions	4	4	1

Cash Paid for Acquisitions (Details) (USD $)
In Millions, unless otherwise specified

12 Months Ended

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

Business Acquisitions

Cost of investment

$ 182.6

^[1]

$ 134.6

^[1]

$ 91.4

^[1]

Less: net cash acquired

(14.8)

(18.5)

(5.3)

Operating expense

3.2

^[2]

0.5

^[2]

3.0

^[2]

185.8

135.1

94.4

Acquisition-related payments

(37.1)

(71.5)

(29.5)

Acquisitions, including deferred payments, net of cash acquired

(145.5)

(63.1)

(61.9)

Cost of investment: current-year acquisitions

Business Acquisitions

Cost of investment

156.8

48.0

47.1

Cost of investment: prior-year acquisitions

Business Acquisitions

Cost of investment

$ 40.6

$ 105.1

$ 49.6

[1]

[2]

Represents cash payments made that were either in excess of the contractual value or contingent upon the future employment of the former owners of acquired companies.

Goodwill (Details) (USD $)
In Millions, unless otherwise specified

12 Months Ended

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

Goodwill

Current year acquisitions

$ 3,580.6

$ 3,444.3

$ 3,368.5

^[1]

133.7

^[1]

96.9

^[1]

Contingent and deferred payments for prior acquisitions

2.2

^[1]

0.8

^[1]

0.4

^[1],[2]

(21.9)

^[1],[2]

IAN

Goodwill

Current year acquisitions

3,074.6

^[1]

2,952.9

^[1]

2,906.0

^[1]

122.0

^[1]

68.5

^[1]

Contingent and deferred payments for prior acquisitions

2.2

^[1]

0.8

^[1]

(2.5)

^[1],[2]

(22.4)

^[1],[2]

CMG

Goodwill

Current year acquisitions

506.0

^[1]

491.4

^[1]

462.5

^[1]

11.7

^[1]

28.4

^[1]

Contingent and deferred payments for prior acquisitions

^[1]

$ 2.9

^[1],[2]

$ 0.5

^[1],[2]

[1]	For all periods presented we have not recorded a goodwill impairment charge.
[2]	Primarily includes foreign currency translation adjustments.

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 68

-Subparagraph l

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph e

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 43

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 72

-Subparagraph d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph e

-Clause 1

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 34

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

U.S. federal statutory income tax rate

The aggregate amount of goodwill acquired in the period and allocated to the reportable segment. The value is stated at fair value based on the purchase price allocation.

+ References+ Details

Other Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Future Amortization Expense 2013	$ 29.9
Future Amortization Expense 2014	29.8
Future Amortization Expense 2015	26.1
Future Amortization Expense 2016	15.2
Future Amortization Expense 2017	5.5
Finite-Lived Intangible Assets [Line Items]
Amortization Expense of Intangible Assets	23.4	20.2	19.4
Gross Amount	258.8	236.1
Accumulated Amortization	(118.1)	(101.8)
Net Amount	140.7	134.3
Acquired Finite-lived Intangible Asset, Amount	67.0	36.0
Customer Lists [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	184.0	165.9
Accumulated Amortization	(96.9)	(81.7)
Net Amount	87.1	84.2
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	59.7	52.9
Accumulated Amortization	(15.5)	(12.3)
Net Amount	44.2	40.6
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	15.1	17.3
Accumulated Amortization	(5.7)	(7.8)
Net Amount	$ 9.4	$ 9.5
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	7 years
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	15 years

Components of Income Before Income Taxes (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Tax Disclosure [Abstract]
Income before income taxes, Domestic	$ 386.9	$ 428.4	$ 216.2
Income before income taxes, Foreign	287.9	310.0	234.4
Income before income taxes	$ 674.8	$ 738.4	$ 450.6

Provision for Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
U.S. federal income taxes (including foreign withholding taxes):
Current federal income taxes									$ 9.4	$ 0.9	$ 13.7
Deferred federal income taxes									118.1	92.3	60.2
Total federal income taxes									127.5	93.2	73.9
State and local income taxes:
Current state and local income taxes									17.1	12.3	16.8
Deferred state and local income taxes									25.3	11.3	(0.1)
Total state and local income taxes									42.4	23.6	16.7
Foreign income taxes:
Current foreign income taxes									83.2	93.1	84.8
Deferred foreign income taxes									(39.8)	(19.7)	(4.1)
Total foreign income taxes									43.4	73.4	80.7
Total provision for income taxes	$ 140.5	$ 41.9	$ 50.1	$ (19.2)	$ 93.7	$ 70.4	$ 47.6	$ (21.5)	$ 213.3	$ 190.2	$ 171.3

Reconciliation of Effective Income Tax Rate (Details) (USD $)
In Millions, unless otherwise specified

3 Months Ended

9 Months Ended

12 Months Ended

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2011

Sep. 30, 2011

Jun. 30, 2011

Mar. 31, 2011

Sep. 30, 2012

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

Valuation Allowance [Line Items]

35.00%

Income tax provision at U.S. federal statutory rate

$ 236.2

$ 258.4

$ 157.7

State and local income taxes, net of federal income tax benefit

27.3

15.3

10.8

Impact of foreign operations, including withholding taxes

8.4

(21.9)

4.7

Change in net valuation allowance

(57.3)

^[1]

(32.9)

^[1]

(2.4)

^[1]

Worthless securities deduction

(23.0)

(2.5)

Increases (decreases) in unrecognized tax benefits, net

24.1

(2.7)

8.9

Total provision for income taxes

(25.4)

(3.0)

(5.9)

140.5

41.9

50.1

(19.2)

93.7

70.4

47.6

(21.5)

213.3

190.2

171.3

Effective income tax rate on operations

31.60%

25.80%

38.00%

Tax contingency reserve adjustment

19.5

Asia Pacific

Valuation Allowance [Line Items]

Reversal of valuation allowance

(26.2)

Continental Europe

Valuation Allowance [Line Items]

Reversal of valuation allowance

$ (21.8)

[1]	Reflects changes in valuation allowance that impacted the effective income tax rate for each year presented.

Components of Deferred Tax Assets (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Deferred Tax Assets, Net [Abstract]
Postretirement/post-employment benefits	$ 40.4	$ 42.4
Deferred compensation	192.4	205.2
Pension costs	27.0	14.2
Basis differences in fixed assets	26.9	81.8
Rent	50.2	38.6
Interest	66.9	54.8
Accruals and reserves	51.1	55.6
Allowance for doubtful accounts	9.2	8.1
Basis differences in intangible assets	(364.9)	(330.1)
Investments in equity securities	(5.2)	30.8
Tax loss/tax credit carry forwards	449.7	478.1
Restructuring and other reorganization-related costs	1.2	2.0
Other	88.3	92.2
Total Deferred Tax Assets, Net	633.2	773.7
Valuation allowance	(392.9)	(489.9)
Net Deferred Tax Assets	$ 240.3	$ 283.8

Change in Valuation Allowance (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Valuation Allowance [Abstract]
Balance at beginning of period	$ 489.9	$ 508.1	$ 425.5
(Reversed) charged to costs and expenses	(49.5)	(25.1)	92.3
Charged (reversed) to gross tax assets and other accounts	(47.5)	6.9	(9.7)
Balance at end of period	$ 392.9	$ 489.9	$ 508.1

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References+ Details

Unrecognized Tax Benefits (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued [Abstract]
Balance at beginning of period	$ 161.0	$ 146.7	$ 160.5
Increases as a result of tax positions taken during a prior year	28.2	5.3	4.6
Decreases as a result of tax positions taken during a prior year	(6.8)	(18.1)	(28.1)
Settlements with taxing authorities	(0.7)	(5.0)	(10.2)
Lapse of statutes of limitation	(1.1)	(0.2)	(1.0)
Increases as a result of tax positions taken during the current year	14.0	32.3	20.5
Balance at end of period	$ 194.6	$ 161.0	$ 146.7

Income Taxes Narrative (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Gain on sale of portion of Facebook	$ 93.6	$ 132.2
One hundred percent valuation allowance	100.00%
Operating loss carryforwards	1,356.6
Undistributed foreign earnings	2,110.0	1,766.7
Unrecognized tax benefits	194.6	161.0	146.7	160.5
Unrecognized tax benefits that would impact effective tax rate	193.5
Income tax penalties and interest accrued	13.5	12.1
Income tax penalties and interest expense	1.4	(0.2)
Estimated unrecognized tax benefit decrease, lower bound	30.0
Estimated unrecognized tax benefit decrease, upper bound	40.0
Domestic country
Operating loss carryforwards	15.1
Operating loss carryforwards, expiration date	expire in the years 2026 through 2029
Domestic country \| Minimum [Member]
Income tax examination year	2007
Open tax years	2009
Domestic country \| Maximum [Member]
Income tax examination year	2008
State and local jurisdiction \| Minimum [Member]
Open tax years	1999
Foreign country
Operating loss carryforwards	1,341.5
Operating loss carryforwards, expiration date	expiration periods from 2013 through 2031
Operating loss carryforwards, no expiration	1,091.1
Operating loss carryforwards, subject to expiration	$ 250.4
Foreign country \| Minimum [Member]
Open tax years	2005

Accumulated Other Comprehensive Loss (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Foreign currency translation adjustment	$ (130.1)	$ (140.9)	$ (51.3)
Unrecognized losses, transition obligation and prior service cost	(146.0)	(85.0)	(67.7)
Net unrealized losses on derivatives	(12.7)	0	0
Net unrealized holding gains on securities	0.8	0.2	0
Accumulated other comprehensive loss, net of tax	$ (288.0)	$ (225.7)	$ (119.0)

Accumulated appreciation or loss, net of tax, in value of the total of available-for-sale securities at the end of an accounting period.

+ References+ Details

Accumulated change, net of tax, in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses.

+ References+ Details

The total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost.

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+ Details

Accumulated adjustment, net of tax, that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency from the functional currency of the reporting entity, net of reclassification of realized foreign currency translation gains or losses.

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+ Details

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 31

-Article 5

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-Name FASB Staff Position (FSP)

-Number FAS115-1/124-1

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-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

+ Details

Plan Information (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2010
Incentive Compensation Plan Initiation Year	May 01, 2009
Performance condition of awards	range from 0% to 300% of the target amount
Maximum award value per employee	$ 6.0
Restricted Cash Plan Initiation Year	Mar. 01, 2009
Stock options
Number of shares initially available for grant		8.1
Stock option expiration period in years	10 years
Stock options \| Minimum [Member]
Award vesting period, years	2 years
Stock options \| Maximum [Member]
Award vesting period, years	4 years
Other Stock-based Awards
Number of shares initially available for grant		26.5
Award vesting period, years	3 years

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

+ References+ Details

Incentive Compensation Expense (Details) (USD $)
In Millions, unless otherwise specified

12 Months Ended

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

$ 50.4

$ 62.4

$ 66.8

Tax benefit

19.7

22.1

Stock options

5.4

6.7

7.4

Stock-settled awards

14.9

21.9

32.7

Cash-settled awards

3.9

5.7

10.9

Performance-based awards

24.5

23.3

11.0

Employee stock purchase plan

0.6

0.7

0.5

Other

1.1

^[1]

4.1

^[1]

4.3

^[1]

Time based cash awards

Incentive compensation expense, Non share-based

10.9

16.6

12.8

Performance based cash awards

Incentive compensation expense, Non share-based

$ 18.9

$ 22.0

$ 11.4

[1]	Represents charges recorded for severance expense related to stock-based compensation awards.

Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References+ Details

Stock Option Activity (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Stock options outstanding as of January 1, 2012	18.1
Granted	0.6
Exercised	(1.2)	(1.3)	(0.5)
Cancelled/expired	(3.0)
Forfeited	(0.4)
Stock options outstanding as of December 31, 2012	14.1	18.1
Stock options outstanding as of Jan 1, 2012, Weighted-average exercise price	$ 12.10
Granted, Weighted-average exercise price	$ 11.65
Exercised, Weighted-average exercise price	$ 9.43
Cancelled/expired, Weighted-average exercise price	$ 25.20
Forfeited, Weighted-average exercise price	$ 4.93
Stock options outstanding as of Dec 31, 2012, Weighted-average exercise price	$ 9.76	$ 12.10
Stock options outstanding, Weighted-average remaining contractual term	4 years 6 months
Stock options outstanding, Aggregate intrinsic value	$ 27.6
Stock options vested and expected to vest, Outstanding	13.4
Stock options vested and expected to vest, Weighted-average exercise price	$ 9.92
Stock options vested and expected to vest, Weighted-average remaining contractual term	4 years 5 months
Stock options vested and expected to vest, Aggregate intrinsic value	24.4
Stock options exercisable, Number	10.2
Stock options exercisable, Weighted-average exercise price	$ 10.89
Stock options exercisable, Weighted-average remaining contractual term	3 years 7 months
Stock options exercisable, Aggregate intrinsic value	9.9
Non-vested as of January 1, 2012	5.0
Granted	0.6
Vested	(1.3)
Forfeited	(0.4)
Non-vested as of December 31, 2012	3.9	5.0
Non-vested as of January 1, 2012, Weighted-average grant date fair value	$ 3.31
Granted, Weighted-average grant date fair value	$ 4.24	$ 4.57	$ 3.88
Vested, Weighted-average grant date fair value	$ 3.94
Forfeited, Weighted-average grant date fair value	$ 2.88
Non-vested as of December 31, 2012, Weighted-average grant date fair value	$ 3.29	$ 3.31
Non-vested options outstanding, Weighted-average remaining contractual term	7 years
Non-vested options outstanding, Aggregate intrinsic value	18.0
Intrinsic value of stock options exercised	2.0	3.2	0.6
Cash received from stock options exercised	$ 11.7	$ 13.3	$ 4.8

Stock Option Valuation Assumptions (Details) (USD $)

12 Months Ended

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

Expected volatility

43.80%

^[1]

39.90%

^[1]

42.20%

^[1]

Expected term (years)

6 years 9 months

^[2]

6 years 8 months

^[2]

6 years 6 months

^[2]

Risk free interest rate

1.30%

^[3]

2.80%

^[3]

3.00%

^[3]

Expected dividend yield

2.10%

^[4]

1.90%

^[4]

0.00%

^[4]

Annualized dividend per share used in calculation of expected dividend yield

$ 0.24

$ 0.00

[1]	The expected volatility used to estimate the fair value of stock options awarded is based on a blend of: (i) historical volatility of our common stock for periods equal to the expected term of our stock options and (ii) implied volatility of tradable forward put and call options to purchase and sell shares of our common stock.
[2]	The estimate of our expected term is based on the average of (i) an assumption that all outstanding options are exercised upon achieving their full vesting date and (ii) an assumption that all outstanding options will be exercised at the midpoint between the current date (i.e., the date awards have ratably vested through) and their full contractual term. In determining the estimate, we considered several factors, including the historical option exercise behavior of our employees and the terms and vesting periods of the options.
[3]	The risk free rate is determined using the implied yield currently available for zero-coupon U.S. government issuers with a remaining term equal to the expected term of the options.
[4]	The expected dividend yield is calculated based on an annualized dividend of $0.24 per share in 2012 and 2011. No dividend yield was assumed in 2010 because we did not pay cash dividends on our common stock during that year.

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

+ References+ Details

Share-based Compensation Awards (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Stock-settled awards
Stock-based Payment Award
Awards granted	0.9	0.8	3.7
Weighted-average grant-date fair value (per award)	$ 11.43	$ 11.94	$ 8.47
Total fair value of vested awards distributed	$ 63.5	$ 63.1	$ 36.4
Accrued dividends on non-vested stock-settled awards	1.1	2.5
Dividends paid for stock-settled awards	1.7	0.3
Cash-settled awards
Stock-based Payment Award
Awards granted	0.1	0	0.6
Weighted-average grant-date fair value (per award)	$ 10.94	$ 8.96	$ 8.50
Total fair value of vested awards distributed	11.1	10.4	4.8
Performance-based awards
Stock-based Payment Award
Awards granted	1.8	1.8	0.1
Weighted-average grant-date fair value (per award)	$ 10.61	$ 11.58	$ 11.02
Total fair value of vested awards distributed	$ 11.5	$ 30.8	$ 4.6

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References+ Details

Non-vested Award Activity (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Stock-based Payment Award
Weighted-average years expected to be recognized over	9 months
Stock-settled awards
Stock-based Payment Award
Non-vested as of January 1, 2012	9.2
Granted	0.9	0.8	3.7
Vested	(5.7)
Forfeited	(0.6)
Non-vested as of December 31, 2012	3.8	9.2
Nonvested as of January 1, 2012, Weighted-average grant date fair value	$ 6.41
Granted, Weighted-average grant-date fair value	$ 11.43	$ 11.94	$ 8.47
Vested, Weighted-average grant date fair value	$ 4.88
Forfeited, Weighted-average grant date fair value	$ 8.16
Nonvested as of December 31, 2012, Weighted-average grant date fair value	$ 9.55	$ 6.41
Total unrecognized compensation expense remaining	$ 6.6
Weighted-average years expected to be recognized over	10 months
Cash-settled awards
Stock-based Payment Award
Non-vested as of January 1, 2012	1.6
Granted	0.1	0	0.6
Vested	(1.0)
Forfeited	(0.2)
Non-vested as of December 31, 2012	0.5	1.6
Nonvested as of January 1, 2012, Weighted-average grant date fair value	$ 5.85
Granted, Weighted-average grant-date fair value	$ 10.94	$ 8.96	$ 8.50
Vested, Weighted-average grant date fair value	$ 4.62
Forfeited, Weighted-average grant date fair value	$ 6.54
Nonvested as of December 31, 2012, Weighted-average grant date fair value	$ 8.62	$ 5.85
Total unrecognized compensation expense remaining	0.8
Weighted-average years expected to be recognized over	5 months
Performance-based awards
Stock-based Payment Award
Non-vested as of January 1, 2012	2.0
Granted	1.8	1.8	0.1
Vested	(1.0)
Forfeited	(0.1)
Non-vested as of December 31, 2012	2.7	2.0
Nonvested as of January 1, 2012, Weighted-average grant date fair value	$ 10.84
Granted, Weighted-average grant-date fair value	$ 10.61	$ 11.58	$ 11.02
Vested, Weighted-average grant date fair value	$ 8.50
Forfeited, Weighted-average grant date fair value	$ 11.62
Nonvested as of December 31, 2012, Weighted-average grant date fair value	$ 11.57	$ 10.84
Total unrecognized compensation expense remaining	11.9
Weighted-average years expected to be recognized over	1 year 10 months
Performance based cash awards settled in shares
Stock-based Payment Award
Total unrecognized compensation expense remaining	26.8
Weighted-average years expected to be recognized over	1 year 8 months
Cash awards granted during the period target value	33.6	31.9	19.0
Time based cash awards
Stock-based Payment Award
Cash awards granted during the period target value	2.7	4.2	31.6
Performance based cash awards
Stock-based Payment Award
Cash awards granted during the period target value	37.4	39.3	18.5
Stock options
Stock-based Payment Award
Total unrecognized compensation expense remaining	$ 4.2

ESPP (Details)	12 Months Ended
ESPP (Details)	Dec. 31, 2012
Employee Stock Purchase Plan description	90% of the lesser of the average market price of a share on the first business day of the offering period or the average market price of a share on the last business day of the offering period of three months
Stock Issued During Period, Shares, Employee Stock Purchase Plans	2,300,000
Employee stock purchase plan
Maximum Employee Subscription Rate	10.00%
Maximum Number of Shares Per Employee	900
Number of shares initially available for grant	15,000,000

The highest percentage of annual salary that an employee is permitted to utilize with respect to the plan.

+ References+ Details

+ References+ Details

Fair value assets and liabilities measured on recurring and nonrecurring basis

Number of shares issued during the period as a result of an employee stock purchase plan.

+ References+ Details

Fair Value on a Recurring Basis (Details) (USD $)
In Millions, unless otherwise specified

Dec. 31, 2012

Dec. 31, 2011

Level 1

$ 1,806.6

$ 1,596.5

16.0

12.9

1.5

1.3

Fair value of assets measured on a recurring basis, percentage of total assets

1,824.1

1,610.7

13.50%

12.50%

Fair value assets and liabilities measured on recurring and nonrecurring basis

^[1]

Level 2

9.0

Fair value of assets measured on a recurring basis, percentage of total assets

9.0

0.00%

0.10%

Fair value assets and liabilities measured on recurring and nonrecurring basis

^[1]

Level 3

Fair value of assets measured on a recurring basis, percentage of total assets

0.00%

Fair value assets and liabilities measured on recurring and nonrecurring basis

25.3

^[1]

58.9

^[1]

Fair Value, Total

1,806.6

1,596.5

16.0

12.9

1.5

10.3

Fair value of assets measured on a recurring basis, percentage of total assets

1,824.1

1,619.7

13.50%

12.50%

$ 25.3

^[1]

$ 58.9

^[1]

[1]

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.

+ References+ Details

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Company may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months.

+ References+ Details

+ References+ Details

Fair Value Unobservable Inputs (Details) (Mandatorily redeemable noncontrolling interests, USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Mandatorily redeemable noncontrolling interests
Fair value assets and liabilities measured on recurring basis unobservable input reconciliation
Balance at beginning of period, mandatorily redeemable noncontrolling interests	$ 58.9	$ 52.0
Level 3 additions	0	28.1
Level 3 reductions	(34.9)	(28.0)
Realized losses included in net income	(1.4)	(6.7)
Foreign currency translation	(0.1)	0.1
Balance at end of period, mandatorily redeemable noncontrolling interests	$ 25.3	$ 58.9

Employee Benefits (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
General Discussion of Pension and Other Postretirement Benefits [Abstract]
Number of Participants Domestic Pension Plan	4,100
Number of Participants Postretirement Benefit Plan	2,400
Deferred Compensation Arrangements [Abstract]
Deferred Compensation Liability	$ 90.0	$ 96.0
Deferred Compensation Expense	9.8	7.6	14.1
Deferred Benefit Liability	173.8	178.3
Deferred Benefit Expense	15.0	14.8	12.9
Cash Surrender Value of Life Insurance	150.2	144.9
Deferred Compensation Plan Assets	5.9	13.8
Supplemental Unemployment Benefits [Abstract]
Duration of disability benefits	24 months
Income Replacement Benefit Obligation	0	0
Health and Life Insurance Benefit Obligation	$ 11.3	$ 9.3

Pension and Postretirement Benefit Obligation (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets (Period End)	$ 497.4	$ 470.8
Domestic Pension Plan
Benefit Obligation [Roll Forward]
Benefit Obligation (Period Start)	129.0	130.9
Service cost	0	0	0
Interest cost	6.3	6.8	7.3
Benefits paid	(10.8)	(11.9)
Plan participant contributions	0	0
Actuarial losses (gains)	16.1	3.2
Settlements and curtailments	0	0
Foreign currency effect	0	0
Other	0	0
Benefit Obligation (Period End)	140.6	129.0	130.9
Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets (Period Start)	107.2	95.3
Actual return on plan assets	13.7	9.7
Employer contributions	5.6	14.1
Plan participant contributions	0	0
Benefits paid	(10.8)	(11.9)
Settlements	0	0
Foreign currency effect	0	0
Fair Value of Plan Assets (Period End)	115.7	107.2	95.3
Defined Benefit Plan, Funded Status of Plan	(24.9)	(21.8)
Amounts Recognized in Consolidated Balance Sheets
Non-current asset	0	0
Current liability	0	0
Non-current liability	(24.9)	(21.8)
Net liability recognized	(24.9)	(21.8)
Accumulated benefit obligation	140.6	129.0
Amounts recognized in Accumulated Other Comprehensive Loss, net
Net actuarial loss	53.6	49.9
Prior service cost (credit)	0	0
Transition obligation	0	0
Total amount recognized	53.6	49.9
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Loss in Next Fiscal Year	8.3
Pension plans with underfunded or unfunded accumulated benefit obligation
Aggregate projected benefit obligation	140.6	129.0
Aggregate accumulated benefit obligation	140.6	129.0
Aggregate fair value of plan assets	115.7	107.2
Foreign Pension Plans
Benefit Obligation [Roll Forward]
Benefit Obligation (Period Start)	456.6	431.1
Service cost	10.2	9.6	9.7
Interest cost	21.9	23.3	22.8
Benefits paid	(20.4)	(21.2)
Plan participant contributions	0.6	0.7
Actuarial losses (gains)	60.0	13.5
Settlements and curtailments	(6.5)	(5.8)
Foreign currency effect	8.9	4.9
Other	1.1	0.5
Benefit Obligation (Period End)	532.4	456.6	431.1
Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets (Period Start)	363.6	312.1
Actual return on plan assets	17.6	9.0
Employer contributions	17.7	65.0
Plan participant contributions	0.6	0.7
Benefits paid	(20.4)	(21.2)
Settlements	(6.1)	(5.8)
Foreign currency effect	8.7	3.8
Fair Value of Plan Assets (Period End)	381.7	363.6	312.1
Defined Benefit Plan, Funded Status of Plan	(150.7)	(93.0)
Amounts Recognized in Consolidated Balance Sheets
Non-current asset	7.4	19.6
Current liability	(8.4)	(8.1)
Non-current liability	(149.7)	(104.5)
Net liability recognized	(150.7)	(93.0)
Accumulated benefit obligation	508.5	432.8
Amounts recognized in Accumulated Other Comprehensive Loss, net
Net actuarial loss	115.7	55.2
Prior service cost (credit)	1.8	1.9
Transition obligation	0	0
Total amount recognized	117.5	57.1
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Loss in Next Fiscal Year	2.9
Pension plans with underfunded or unfunded accumulated benefit obligation
Aggregate projected benefit obligation	515.8	132.6
Aggregate accumulated benefit obligation	497.3	127.0
Aggregate fair value of plan assets	358.5	20.2
Domestic Postretirement Benefit Plan
Benefit Obligation [Roll Forward]
Benefit Obligation (Period Start)	50.8	51.8
Service cost	0.2	0.2	0.3
Interest cost	2.3	2.7	2.8
Benefits paid	(5.9)	(6.2)
Plan participant contributions	1.7	1.4
Actuarial losses (gains)	(2.5)	0.9
Settlements and curtailments	0	0
Foreign currency effect	0	0
Other	0	0
Benefit Obligation (Period End)	46.6	50.8	51.8
Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets (Period Start)	0	0
Actual return on plan assets	0	0
Employer contributions	4.2	4.8
Plan participant contributions	1.7	1.4
Benefits paid	(5.9)	(6.2)
Settlements	0	0
Foreign currency effect	0	0
Fair Value of Plan Assets (Period End)	0	0	0
Defined Benefit Plan, Funded Status of Plan	(46.6)	(50.8)
Amounts Recognized in Consolidated Balance Sheets
Non-current asset	0	0
Current liability	(4.6)	(4.9)
Non-current liability	(42.0)	(45.9)
Net liability recognized	(46.6)	(50.8)
Amounts recognized in Accumulated Other Comprehensive Loss, net
Net actuarial loss	4.2	6.7
Prior service cost (credit)	(0.2)	(0.3)
Transition obligation	0	0.1
Total amount recognized	$ 4.0	$ 6.5

Net Periodic Cost (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Domestic Pension Plan
Defined Benefit Plan, Net Periodic Benefit Cost
Service cost	$ 0	$ 0	$ 0
Interest cost	6.3	6.8	7.3
Expected return on plan assets	(7.7)	(7.5)	(7.0)
Settlement and curtailment losses	0	0	0
Amortization of:
Transition obligation	0	0	0
Prior service cost (credit)	0	0	0
Unrecognized actuarial losses	6.4	6.6	8.6
Defined Benefit Plan, Net Periodic Benefit Cost	5.0	5.9	8.9
Net Periodic Benefit, Discount Rate	5.00%	5.50%	5.51%
Expected Long-term Return on Assets	7.25%	7.50%	7.49%
Benefit Obligation, Discount Rate	4.00%	5.00%	5.50%
Foreign Pension Plans
Defined Benefit Plan, Net Periodic Benefit Cost
Service cost	10.2	9.6	9.7
Interest cost	21.9	23.3	22.8
Expected return on plan assets	(18.2)	(19.0)	(17.0)
Settlement and curtailment losses	0.7	0	1.4
Amortization of:
Transition obligation	0	0	0
Prior service cost (credit)	0.2	0.2	0.2
Unrecognized actuarial losses	1.0	0.7	1.9
Defined Benefit Plan, Net Periodic Benefit Cost	15.8	14.8	19.0
Net Periodic Benefit, Discount Rate	5.00%	5.45%	5.50%
Net Periodic Benefit, Rate of Compensation Increase	3.66%	4.37%	4.43%
Expected Long-term Return on Assets	5.02%	5.88%	5.84%
Benefit Obligation, Discount Rate	4.32%	5.00%	5.45%
Benefit Obligation, Rate of Compensation Increase	3.57%	3.66%	4.34%
Domestic Postretirement Benefit Plan
Defined Benefit Plan, Net Periodic Benefit Cost
Service cost	0.2	0.2	0.3
Interest cost	2.3	2.7	2.8
Expected return on plan assets	0	0	0
Settlement and curtailment losses	0	0	0
Amortization of:
Transition obligation	0.2	0.1	0.2
Prior service cost (credit)	(0.1)	(0.1)	(0.1)
Unrecognized actuarial losses	0	0	0
Defined Benefit Plan, Net Periodic Benefit Cost	$ 2.6	$ 2.9	$ 3.2
Net Periodic Benefit, Discount Rate	5.00%	5.50%	5.50%
Benefit Obligation, Discount Rate	4.00%	5.00%	5.50%
Health Care Cost Trend Rate Assumed for Next Year	8.00%	8.00%	8.50%
Year Ultimate Trend Rate is Reached	2019	2016	2017
Ultimate Health Care Cost Trend Rate	5.00%	5.50%	5.50%

Fair Value of Pension Plan Assets (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Fair value assets and liabilities measured on recurring and nonrecurring basis
Fair Value of Plan Assets	$ 497.4	$ 470.8
Balance at beginning of period	85.0	57.2
Actual return on plan assets:
Assets sold during the year	0	0.1
Assets still held at year end	0.9	(1.8)
Net purchases, sales and settlements	2.4	29.5
Balance at end of period	88.3	85.0
Level 1
Fair value assets and liabilities measured on recurring and nonrecurring basis
Fair Value of Plan Assets	50.9	49.5
Level 2
Fair value assets and liabilities measured on recurring and nonrecurring basis
Fair Value of Plan Assets	358.2	336.3
Level 3
Fair value assets and liabilities measured on recurring and nonrecurring basis
Fair Value of Plan Assets	88.3	85.0
Investment funds
Fair value assets and liabilities measured on recurring and nonrecurring basis
Fair Value of Plan Assets	398.4	369.3
Balance at beginning of period	43.8	53.9
Actual return on plan assets:
Assets sold during the year	0	0.1
Assets still held at year end	2.2	(0.6)
Net purchases, sales and settlements	2.2	(9.6)
Balance at end of period	48.2	43.8
Investment funds \| Level 1
Fair value assets and liabilities measured on recurring and nonrecurring basis
Fair Value of Plan Assets	22.3	18.4
Investment funds \| Level 2
Fair value assets and liabilities measured on recurring and nonrecurring basis
Fair Value of Plan Assets	327.9	307.1
Investment funds \| Level 3
Fair value assets and liabilities measured on recurring and nonrecurring basis
Fair Value of Plan Assets	48.2	43.8
Insurance contracts
Fair value assets and liabilities measured on recurring and nonrecurring basis
Fair Value of Plan Assets	24.8	24.8
Insurance contracts \| Level 1
Fair value assets and liabilities measured on recurring and nonrecurring basis
Fair Value of Plan Assets	0	0
Insurance contracts \| Level 2
Fair value assets and liabilities measured on recurring and nonrecurring basis
Fair Value of Plan Assets	24.8	24.8
Insurance contracts \| Level 3
Fair value assets and liabilities measured on recurring and nonrecurring basis
Fair Value of Plan Assets	0	0
Limited partnerships
Fair value assets and liabilities measured on recurring and nonrecurring basis
Fair Value of Plan Assets	39.8	41.1
Balance at beginning of period	41.1	3.2
Actual return on plan assets:
Assets sold during the year	0	0
Assets still held at year end	(1.3)	(1.2)
Net purchases, sales and settlements	0	39.1
Balance at end of period	39.8	41.1
Limited partnerships \| Level 1
Fair value assets and liabilities measured on recurring and nonrecurring basis
Fair Value of Plan Assets	0	0
Limited partnerships \| Level 2
Fair value assets and liabilities measured on recurring and nonrecurring basis
Fair Value of Plan Assets	0	0
Limited partnerships \| Level 3
Fair value assets and liabilities measured on recurring and nonrecurring basis
Fair Value of Plan Assets	39.8	41.1
Other plan assets
Fair value assets and liabilities measured on recurring and nonrecurring basis
Fair Value of Plan Assets	34.4	35.6
Balance at beginning of period	0.1	0.1
Actual return on plan assets:
Assets sold during the year	0	0
Assets still held at year end	0	0
Net purchases, sales and settlements	0.2	0
Balance at end of period	0.3	0.1
Other plan assets \| Level 1
Fair value assets and liabilities measured on recurring and nonrecurring basis
Fair Value of Plan Assets	28.6	31.1
Other plan assets \| Level 2
Fair value assets and liabilities measured on recurring and nonrecurring basis
Fair Value of Plan Assets	5.5	4.4
Other plan assets \| Level 3
Fair value assets and liabilities measured on recurring and nonrecurring basis
Fair Value of Plan Assets	$ 0.3	$ 0.1

Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

+ References+ Details

Employee Benefits Allocation of Plan Assets (Details)	12 Months Ended
Employee Benefits Allocation of Plan Assets (Details)	Dec. 31, 2012	Dec. 31, 2011
Allocation of Plan Assets
Defined Benefit Plan, Target Plan Asset Allocations	100.00%
Defined Benefit Plan, Actual Plan Asset Allocations	100.00%	100.00%
Equity securities
Allocation of Plan Assets
Defined Benefit Plan, Target Plan Asset Allocations	23.00%
Defined Benefit Plan, Actual Plan Asset Allocations	22.00%	20.00%
Fixed income securities
Allocation of Plan Assets
Defined Benefit Plan, Target Plan Asset Allocations	48.00%
Defined Benefit Plan, Actual Plan Asset Allocations	44.00%	47.00%
Real estate
Allocation of Plan Assets
Defined Benefit Plan, Target Plan Asset Allocations	5.00%
Defined Benefit Plan, Actual Plan Asset Allocations	5.00%	1.00%
Other plan assets
Allocation of Plan Assets
Defined Benefit Plan, Target Plan Asset Allocations	24.00%
Defined Benefit Plan, Actual Plan Asset Allocations	29.00%	32.00%

Pension Cash Flows (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Domestic Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans
Employer contributions	$ 5.6	$ 14.1
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year	1.0
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity
Expected Future Benefit Payments in 2013	10.1
Expected Future Benefit Payments in 2014	9.8
Expected Future Benefit Payments in 2015	9.6
Expected Future Benefit Payments in 2016	9.3
Expected Future Benefit Payments in 2017	9.1
Expected Future Benefit Payments in 2018-2022	42.8
Foreign Pension Plans
Defined Benefit Plans and Other Postretirement Benefit Plans
Employer contributions	17.7	65.0
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year	19.0
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity
Expected Future Benefit Payments in 2013	22.0
Expected Future Benefit Payments in 2014	23.0
Expected Future Benefit Payments in 2015	23.2
Expected Future Benefit Payments in 2016	26.0
Expected Future Benefit Payments in 2017	25.9
Expected Future Benefit Payments in 2018-2022	143.5
Domestic Postretirement Benefit Plan
Defined Benefit Plans and Other Postretirement Benefit Plans
Employer contributions	4.2	4.8
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity
Expected Future Benefit Payments in 2013	5.0
Expected Future Benefit Payments in 2014	4.8
Expected Future Benefit Payments in 2015	4.7
Expected Future Benefit Payments in 2016	4.4
Expected Future Benefit Payments in 2017	4.2
Expected Future Benefit Payments in 2018-2022	17.5
Disclosure of Expected Federal Subsidy Receipts
Prescription Drug Subsidy Receipts in 2013	0.4
Prescription Drug Subsidy Receipts in 2014	0.5
Prescription Drug Subsidy Receipts in 2015	0.5
Prescription Drug Subsidy Receipts in 2016	0.5
Prescription Drug Subsidy Receipts in 2017	0.5
Prescription Drug Subsidy Receipts in 2018-2022	$ 0.9

Savings Plans (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Domestic country
Defined Benefit Plans and Other Postretirement Benefit Plans
Cost Recognized	$ 35.6	$ 35.4	$ 34.3
Discretionary Company Contribution
Defined Benefit Plans and Other Postretirement Benefit Plans
Cost Recognized	4.8	3.7	3.6
Defined Contribution Plans Participant Forfeitures
Defined Benefit Plans and Other Postretirement Benefit Plans
Cost Recognized	(3.0)	(2.6)	(2.4)
Foreign country
Defined Benefit Plans and Other Postretirement Benefit Plans
Cost Recognized	$ 34.0	$ 30.8	$ 26.2

Segment Information Operations (Details) (USD $)
In Millions, unless otherwise specified

3 Months Ended

12 Months Ended

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2011

Sep. 30, 2011

Jun. 30, 2011

Mar. 31, 2011

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

Segments:

Revenue

$ 2,063.3

$ 1,670.4

$ 1,715.7

$ 1,506.8

$ 2,072.6

$ 1,726.5

$ 1,740.7

$ 1,474.8

$ 6,956.2

$ 7,014.6

$ 6,507.3

Income before income taxes

678.3

687.2

548.7

Interest expense

(133.5)

(136.8)

(139.7)

Interest income

29.5

37.8

28.7

Other income, net

95.4

1.7

^[1]

4.7

(1.3)

13.9

137.1

5.3

(6.1)

100.5

150.2

12.9

674.8

738.4

450.6

Depreciation and amortization of fixed assets and intangible assets

147.7

150.9

148.4

169.2

140.3

96.3

IAN

Segments:

Segment revenue

5,728.5

5,891.8

5,468.4

Depreciation and amortization of fixed assets and intangible assets

701.1

728.0

615.2

119.7

125.7

116.7

97.5

94.1

83.5

CMG

Segments:

Segment revenue

1,227.7

1,122.8

1,038.9

Depreciation and amortization of fixed assets and intangible assets

114.5

101.2

78.8

14.4

12.8

14.2

26.7

16.9

6.9

Corporate and other

Segments:

Depreciation and amortization of fixed assets and intangible assets

(137.3)

(142.0)

(145.3)

13.6

12.4

17.5

$ 45.0

$ 29.3

$ 5.9

[1]	The three months ended December 31, 2012 and the three months ended September 30, 2011, include a pre-tax gain of $93.6 and $132.2, respectively, related to the sale of our holdings in Facebook.

Segment Information Balance Sheet (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Segments:
Assets	$ 13,493.9	$ 12,908.7
IAN
Segments:
Assets	11,035.3	10,589.2
CMG
Segments:
Assets	1,073.1	1,019.9
Corporate and other
Segments:
Assets	$ 1,385.5	$ 1,299.6

Business Acquisition, Contingent Consideration [Line Items]

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References+ Details

Segment Information Segment Information by Major Geographic Area (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenues and Long-Lived Assets
Long-Lived Assets	$ 840.1				$ 796.5				$ 840.1	$ 796.5
Revenue	2,063.3	1,670.4	1,715.7	1,506.8	2,072.6	1,726.5	1,740.7	1,474.8	6,956.2	7,014.6	6,507.3
Domestic
Revenues and Long-Lived Assets
Long-Lived Assets	502.5				477.2				502.5	477.2
Revenue									3,803.6	3,887.7	3,709.9
Total international
Revenues and Long-Lived Assets
Long-Lived Assets	337.6				319.3				337.6	319.3
Revenue									3,152.6	3,126.9	2,797.4
United Kingdom
Revenues and Long-Lived Assets
Long-Lived Assets	64.3				65.2				64.3	65.2
Revenue									572.0	539.4	469.6
Continental Europe
Revenues and Long-Lived Assets
Long-Lived Assets	76.0				72.1				76.0	72.1
Revenue									823.1	908.9	863.2
Asia Pacific
Revenues and Long-Lived Assets
Long-Lived Assets	88.0				78.4				88.0	78.4
Revenue									838.1	741.7	639.8
Latin America
Revenues and Long-Lived Assets
Long-Lived Assets	70.5				69.1				70.5	69.1
Revenue									450.1	444.4	363.3
Other
Revenues and Long-Lived Assets
Long-Lived Assets	38.8				34.5				38.8	34.5
Revenue									$ 469.3	$ 492.5	$ 461.5

Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Commitments and Contingencies Disclosure [Abstract]
Gross rent expense	$ 358.5	$ 369.5	$ 365.2
Third-party sublease rental income	(17.5)	(19.4)	(20.0)
Net rent expense	$ 341.0	$ 350.1	$ 345.2

Future minimum lease payments (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Rent Obligations, due 2013	$ 309.1
Rent Obligations, due 2014	275.8
Rent Obligations, due 2015	243.4
Rent Obligations, due 2016	200.3
Rent Obligations, due 2017	164.2
Rent Obligations, due thereafter	675.8
Total Rent Obligations	1,868.6
Sublease Rental Income, due 2013	(26.9)
Sublease Rental Income, due 2014	(14.7)
Sublease Rental Income, due 2015	(7.3)
Sublease Rental Income, due 2016	(2.1)
Sublease Rental Income, due 2017	(0.6)
Sublease Rental Income, due thereafter	(0.3)
Total Sublease Rental Income	(51.9)
Net Rent, due 2013	282.2
Net Rent, due 2014	261.1
Net Rent, due 2015	236.1
Net Rent, due 2016	198.2
Net Rent, due 2017	163.6
Net Rent, due thereafter	675.5
Total Net Rent	$ 1,816.7

Guarantees (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Commitments and Contingencies Disclosure [Abstract]
Parent company guarantees on lease obligations	$ 410.3	$ 385.1
Parent company guarantees relating to credit facilities	283.4	327.5
Assets pledged as security for parent company guarantees	$ 0

Contingent Acquisition Obligations (Details) (USD $)
In Millions, unless otherwise specified

Dec. 31, 2012

Deferred acquisition payments

Recorded Unconditional Purchase Obligation Due in Next Twelve Months

$ 26.0

Recorded Unconditional Purchase Obligation Due in Second Year

12.4

Recorded Unconditional Purchase Obligation Due in Third Year

9.7

Recorded Unconditional Purchase Obligation Due in Fourth Year

46.4

Recorded Unconditional Purchase Obligation Due in Fifth Year

18.9

Recorded Unconditional Purchase Obligation Due after Fifth Year

2.0

Business Acquisition, Contingent Consideration [Line Items]

115.4

Redeemable noncontrolling interests and call options with affiliates

Recorded Unconditional Purchase Obligation Due in Next Twelve Months

20.5

Recorded Unconditional Purchase Obligation Due in Second Year

43.8

Recorded Unconditional Purchase Obligation Due in Third Year

32.9

Recorded Unconditional Purchase Obligation Due in Fourth Year

5.7

Recorded Unconditional Purchase Obligation Due in Fifth Year

2.2

Recorded Unconditional Purchase Obligation Due after Fifth Year

10.6

Business Acquisition, Contingent Consideration [Line Items]

115.7

^[1]

Redeemable at noncontrolling equity owners discretion

Recorded Unconditional Purchase Obligation Due in Next Twelve Months

16.4

Total contingent acquisition payments

Business Acquisition, Contingent Consideration [Line Items]

Recorded Unconditional Purchase Obligation Due in Next Twelve Months

46.5

Recorded Unconditional Purchase Obligation Due in Second Year

56.2

Recorded Unconditional Purchase Obligation Due in Third Year

42.6

Recorded Unconditional Purchase Obligation Due in Fourth Year

52.1

Recorded Unconditional Purchase Obligation Due in Fifth Year

21.1

Recorded Unconditional Purchase Obligation Due after Fifth Year

12.6

Business Acquisition, Contingent Consideration [Line Items]

231.1

Cash compensation expense included in contingent acquisitions

Recorded Unconditional Purchase Obligation Due in Next Twelve Months

(0.7)

Recorded Unconditional Purchase Obligation Due in Second Year

(0.6)

Recorded Unconditional Purchase Obligation Due in Third Year

(0.8)

Recorded Unconditional Purchase Obligation Due in Fourth Year

(0.2)

Recorded Unconditional Purchase Obligation Due in Fifth Year

Recorded Unconditional Purchase Obligation Due after Fifth Year

Business Acquisition, Contingent Consideration [Line Items]

(2.3)

Total contingent acquisition payments excluding compensation expense

Recorded Unconditional Purchase Obligation Due in Next Twelve Months

45.8

Recorded Unconditional Purchase Obligation Due in Second Year

55.6

Recorded Unconditional Purchase Obligation Due in Third Year

41.8

Recorded Unconditional Purchase Obligation Due in Fourth Year

51.9

Recorded Unconditional Purchase Obligation Due in Fifth Year

21.1

Recorded Unconditional Purchase Obligation Due after Fifth Year

12.6

$ 228.8

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